QUIC - Quick UDP Internet Connections
What is QUIC?
QUIC (Quick UDP Internet Connections) is a modern transport layer network protocol developed by Google and later standardized by the IETF. It is designed to improve the performance of connection-oriented web applications, especially over unreliable networks.
Why is QUIC useful?
Faster Connection Establishment : QUIC combines the handshake and encryption setup into a single step, reducing latency.
Built-in Encryption : QUIC uses TLS 1.3 by default, ensuring secure communication without needing separate layers.
Reduced Latency for Web Applications: Especially beneficial for HTTP/3, which runs over QUIC.
Better Performance on Mobile Networks: QUIC handles packet loss and network changes more gracefully.
How it works?
Client sends initial packet with QUIC and TLS handshake combined.
Server responds with its handshake and encryption keys.
Secure connection is established in 1 round-trip (or 0-RTT if previously connected).
Data is exchanged over multiple independent streams.
Connection adapts to network changes without restarting.
Where is QUIC used?
HTTP/3 (the latest version of HTTP) is built on QUIC.
Google services (like Gmail, YouTube, Search).
Facebook, Cloudflare, Akamai, and other major platforms.
Why OSI Layer: Transport Layer (Layer 4)?
The OSI model is responsible for end-to-end communication between devices.
It ensures that data is delivered reliably, in order, and without duplication.
QUIC fits into this layer because it provides all these services — and more — over UDP.
What are the key features?
Built on UDP.
Faster Handshake (0-RTT or 1-RTT).
Multiplexed Streams.
What are the benefits of QUIC?
Lower latency.
Faster handshakes.
Connection migration.
Built-in encryption.
Multiplexed streams.
No TCP head-of-line blocking.
Which protocols run over QUIC?
HTTP/3 (latest web protocol).
gQUIC (Google’s older implementation).
HTTP/3 is the first widely adopted application-layer protocol built on QUIC.
Why was QUIC created?
To solve issues in HTTP/2 and TCP, such as: * Head-of-line blocking at the transport layer. * Slow handshakes. * Lack of built-in encryption at the transport level.
Is QUIC faster than TCP?
Yes — QUIC is faster than TCP in most real-world cases, especially on: * Mobile networks. * High-latency or lossy networks. It eliminates the slow TCP + TLS handshake process.
What is the working flow of QUIC?
Client sends QUIC packet over UDP: * No need to set up a TCP connection. * It sends a QUIC Initial packet over UDP with TLS 1.3 handshake included.
Server responds with TLS and QUIC setup: * Server replies with its own QUIC packet + TLS handshake response. * Both encryption and connection are established in just 1 round-trip.
Connection is now ready: * After handshake, both client and server start exchanging encrypted data. * No extra steps like in TCP + TLS.
Multiplexed streams are used: * Data is sent in multiple parallel streams within a single QUIC connection. * Streams don’t block each other (unlike TCP).
Loss recovery & congestion control: * QUIC has built-in packet loss detection and congestion control. * No reliance on TCP mechanisms.
Connection can migrate (mobile networks): * If IP changes (e.g., switch from Wi-Fi to mobile), QUIC uses a connection ID to continue the session without reconnecting.
Session ends normally: * When done, client or server sends a CLOSE frame. * Connection is securely and cleanly terminated.
Is QUIC suitable for real-time applications?
Yes — Real-Time Use Cases Suitable for QUIC: * Live video streaming. * Chat/messaging apps. * VoIP (Voice over IP).
Topics in this section,
In this section, you are going to learn
Terminology
Version Info
S.No |
Version |
RFC |
Year |
contribution/core ideas |
|---|---|---|---|---|
1 |
QUIC v1 |
RFC 9000 |
2021 |
First standardized version; supports multiplexed streams, connection migration, and TLS 1.3 encryption. |
2 |
QUIC TLS Usage |
RFC 9001 |
2021 |
Specifies how QUIC uses TLS 1.3 for |
encryption and authentication. |
||||
3 |
QUIC Loss & Congestion Control |
RFC 9002 |
2021 |
Describes QUICs mechanisms for |
detecting packet loss and managing congestion. |
||||
4 |
QUIC Datagram Extension |
RFC 9221 |
2022 |
Adds support for unreliable datagram |
transmission over QUIC. |
||||
5 |
QUIC Bit Greasing |
RFC 9287 |
2022 |
Prevents protocol ossification by |
reserving bits for future use. |
||||
6 |
QUIC v2 |
RFC 9369 |
2023 |
Minor changes to improve deployability and prevent protocol ossification; interoperable with v1. |
setup
setup
QUIC INITIAL Packet
S.No |
Packet Components |
Description |
Size(Bytes) |
|---|---|---|---|
1 |
Initial Packet |
Used to initiate a connection and carry the first part of the TLS handshake. |
1201350 (variable) |
Header Form |
Indicates long header format |
1 bit |
|
Fixed Bit |
Always set to 1 to identify QUIC |
1 bit |
|
Packet Type |
Initial = 0x00 |
2 bits |
|
Version |
QUIC version number |
4 bytes |
|
Destination Conn. ID |
Server-side connection identifier |
820 bytes |
|
Source Conn. ID |
Client-side connection identifier |
820 bytes |
|
Token Length |
Length of token |
12 bytes |
|
Token |
Used for address validation |
0256+ bytes |
|
Length |
Length of remaining packet |
12 bytes |
|
Packet Number |
Sequence number |
14 bytes |
|
Payload (CRYPTO) |
TLS handshake data |
Variable |
|
AEAD Tag |
Authentication tag |
16 bytes |
QUIC HANDSHAKE Packet
2 |
Handshake Packet |
Continues the TLS handshake after Initial packet. |
1001350 (variable) |
|---|---|---|---|
Header Form |
Long header format |
1 bit |
|
Packet Type |
Handshake = 0x02 |
2 bits |
|
Version |
QUIC version |
4 bytes |
|
Destination Conn. ID |
Server-side ID |
820 bytes |
|
Source Conn. ID |
Client-side ID |
820 bytes |
|
Length |
Length of remaining packet |
12 bytes |
|
Packet Number |
Sequence number |
14 bytes |
|
Payload (CRYPTO) |
TLS handshake continuation |
Variable |
|
AEAD Tag |
Authentication tag |
16 bytes |
QUIC 0 RTT Packet
3 |
0-RTT Packet |
Sends early data before handshake completes |
1001350 (variable) |
|---|---|---|---|
(if previously connected). |
|||
Header Form |
Long header format |
1 bit |
|
Packet Type |
0-RTT = 0x01 |
2 bits |
|
Version |
QUIC version |
4 bytes |
|
Destination Conn. ID |
Server-side ID |
820 bytes |
|
Source Conn. ID |
Client-side ID |
820 bytes |
|
Length |
Length of remaining packet |
12 bytes |
|
Packet Number |
Sequence number |
14 bytes |
|
Payload (STREAM) |
Early application data |
Variable |
|
AEAD Tag |
Authentication tag |
16 bytes |
QUIC RETRY Packet
4 |
Retry Packet |
Sent by server to request address validation before accepting |
50300 (variable) |
|---|---|---|---|
connection. |
|||
Header Form |
Long header format |
1 bit |
|
Packet Type |
Retry = 0x03 |
2 bits |
|
Version |
QUIC version |
4 bytes |
|
Destination Conn. ID |
Server-side ID |
820 bytes |
|
Source Conn. ID |
Client-side ID |
820 bytes |
|
Retry Token |
Token for address validation |
Variable |
|
Integrity Tag |
Ensures authenticity |
16 bytes |
QUIC SHORT HEADER Packet
5 |
Short Header Packet |
Used for regular encrypted communication after handshake. |
501350 (variable) |
|---|---|---|---|
Header Form |
Short header format |
1 bit |
|
Fixed Bit |
Always set to 1 |
1 bit |
|
Key Phase Bit |
Indicates key phase for encryption |
1 bit |
|
Packet Number Length |
Length of packet number field |
2 bits |
|
Destination Conn. ID |
Server-side ID |
820 bytes |
|
Packet Number |
Sequence number |
14 bytes |
|
Payload (STREAM/ACK) |
Application data or acknowledgments |
Variable |
|
AEAD Tag |
Authentication tag |
16 bytes |
S.No |
Use Case |
Description |
|---|---|---|
1 |
Web Browsing (HTTP/3) |
QUIC is the transport layer for HTTP/3, improving page load times and latency. |
2 |
Mobile Networks |
Handles frequent IP changes and packet loss better than TCP, ideal for mobile. |
3 |
Video Streaming |
Reduces buffering and improves start times by minimizing handshake delays. |
4 |
Online Gaming |
Offers low-latency, reliable delivery over UDP, ideal for real-time games. |
5 |
VoIP and Video Calls |
Enhances call quality with faster recovery from packet loss and jitter. |
6 |
Cloud Services |
Used by services like Google Cloud and Microsoft to speed up API responses. |
7 |
IoT Communications |
Efficient for lightweight, secure communication in constrained environments. |
8 |
File Transfers |
Faster and more reliable than TCP in high-latency or lossy networks. |
9 |
VPN Services |
Some VPNs use QUIC to bypass throttling and improve connection stability. |
10 |
CDNs (Content Delivery Networks) |
Used by CDNs to deliver content faster and more securely to end users. |
S.No |
QUIC features |
Description |
|---|---|---|
1 |
Built on UDP |
Uses UDP instead of TCP, enabling faster and more flexible communication. |
2 |
Integrated TLS 1.3 |
Combines transport and security layers, reducing handshake time and overhead |
3 |
0-RTT Connection Resumption |
Allows data to be sent immediately on reconnecting to a known server. |
4 |
Multiplexing Without Head-of-Line Blocking |
Multiple streams in one connection without blocking others on packet loss. |
5 |
Connection Migration |
Supports seamless switching between networks (e.g., Wi-Fi to mobile data). |
6 |
Forward Error Correction (FEC) |
Improves reliability by recovering from packet loss without retransmission. |
7 |
Encrypted Headers and Payload |
Enhances privacy and security by encrypting most of the packet. |
8 |
Low Latency Handshake |
Reduces connection setup time compared to TCP + TLS. |
9 |
Stream Prioritization |
Allows prioritizing important data streams over others. |
10 |
Built-in Congestion Control |
Implements advanced congestion control algorithms for better performance. |
Bulit On UDP - Testcases
S.No |
Test Case |
Description |
Expected Result |
|---|---|---|---|
1 |
UDP Port Binding |
Bind QUIC to UDP port |
Port bound successfully |
2 |
UDP Packet Transmission |
Send QUIC packet over UDP |
Packet transmitted |
3 |
UDP Packet Reception |
Receive QUIC packet over UDP |
Packet received |
4 |
UDP Header Validation |
Validate UDP header fields |
Fields correct |
5 |
UDP Checksum Verification |
Verify checksum of UDP packet |
Checksum valid |
6 |
UDP MTU Handling |
Handle packets near MTU size |
No fragmentation |
7 |
UDP Fragmentation Avoidance |
Avoid IP fragmentation |
Packets sized appropriately |
8 |
UDP NAT Traversal |
Traverse NAT using UDP |
Connection established |
9 |
UDP Firewall Traversal |
Pass through firewall rules |
Connection allowed |
10 |
UDP Port Reuse |
Reuse UDP port for multiple connections |
Connections isolated |
11 |
UDP Socket Timeout |
Handle socket timeout gracefully |
Timeout managed |
12 |
UDP Packet Loss Simulation |
Simulate packet loss |
QUIC recovers via retransmission |
13 |
UDP Packet Reordering |
Simulate out-of-order delivery |
QUIC reorders correctly |
14 |
UDP Packet Duplication |
Simulate duplicate packets |
Duplicates discarded |
15 |
UDP Packet Delay |
Simulate network delay |
QUIC handles delay |
16 |
UDP Packet Corruption |
Simulate corrupted packet |
QUIC detects and discards |
17 |
UDP Stateless Retry |
Perform stateless retry |
Retry packet sent |
18 |
UDP Connection Establishment |
Establish QUIC connection over UDP |
Connection successful |
19 |
UDP Connection Termination |
Terminate QUIC connection |
Connection closed cleanly |
20 |
UDP Port Unreachable |
Send to unreachable port |
Error handled gracefully |
21 |
UDP Port Scan Detection |
Detect port scanning |
Security alert triggered |
22 |
UDP Rate Limiting |
Apply rate limits |
Excess packets dropped |
23 |
UDP Socket Buffer Overflow |
Simulate buffer overflow |
Overflow handled |
24 |
UDP Keepalive Mechanism |
Send keepalive packets |
Connection maintained |
25 |
UDP Stateless Operation |
Operate without connection state |
Stateless packets processed |
26 |
UDP Socket Binding Conflict |
Bind to already used port |
Error returned |
27 |
UDP IPv4 Support |
Use IPv4 for UDP transport |
IPv4 packets transmitted |
28 |
UDP IPv6 Support |
Use IPv6 for UDP transport |
IPv6 packets transmitted |
29 |
UDP Multicast Handling |
Handle multicast traffic |
Multicast ignored or processed |
30 |
UDP Broadcast Handling |
Handle broadcast traffic |
Broadcast ignored or processed |
31 |
UDP QoS Tagging |
Tag packets with QoS |
Tags applied correctly |
32 |
UDP ECN Support |
Support Explicit Congestion Notification |
ECN bits respected |
33 |
UDP DSCP Support |
Support Differentiated Services Code Point |
DSCP bits respected |
34 |
UDP Socket Closure |
Close UDP socket cleanly |
Socket closed |
35 |
UDP Socket Reinitialization |
Reinitialize socket after closure |
Socket reopened |
36 |
UDP Packet Size Validation |
Validate packet size limits |
Packets within limits |
37 |
UDP Header Manipulation |
Modify UDP header fields |
Changes reflected |
38 |
UDP NAT Keepalive |
Send NAT keepalive packets |
NAT mapping preserved |
39 |
UDP Firewall Rule Bypass |
Bypass restrictive rules |
Connection established |
40 |
UDP Port Randomization |
Use randomized source ports |
Ports vary per connection |
41 |
UDP Packet Inspection |
Inspect UDP packet contents |
QUIC payload visible |
42 |
UDP Packet Encryption |
Encrypt QUIC payload |
Payload encrypted |
43 |
UDP Packet Integrity |
Ensure integrity of payload |
Integrity verified |
44 |
UDP Packet Replay Protection |
Prevent replay attacks |
Replays detected and blocked |
45 |
UDP Connection Migration |
Migrate connection across networks |
Migration successful |
46 |
UDP Stateless Reset |
Send stateless reset |
Connection reset |
47 |
UDP Packet Throttling |
Throttle packet rate |
Rate controlled |
48 |
UDP Socket Permissions |
Check socket access rights |
Permissions enforced |
49 |
UDP Packet Logging |
Log transmitted/received packets |
Logs updated |
50 |
UDP Compliance Check |
Ensure compliance with UDP standards |
Fully compliant behavior |
Integrated TLS1.3 - Testcases
S.No |
Test Case |
Description |
Expected Result |
|---|---|---|---|
1 |
TLS 1.3 Handshake |
Initiate TLS 1.3 handshake over QUIC |
Handshake completes successfully |
2 |
Cipher Suite Negotiation |
Verify supported cipher suites |
Only TLS 1.3 cipher suites are negotiated |
3 |
Key Exchange |
Perform key exchange using TLS 1.3 |
Keys exchanged securely |
4 |
Session Resumption |
Resume session using 0-RTT |
Session resumed with early data |
5 |
0-RTT Data Handling |
Send data during 0-RTT |
Data accepted or rejected based on policy |
6 |
Forward Secrecy |
Verify forward secrecy |
Session keys not reused |
7 |
Certificate Validation |
Validate server certificate |
Certificate is verified successfully |
8 |
Invalid Certificate |
Use expired/invalid certificate |
Connection fails with error |
9 |
Mutual Authentication |
Client and server authenticate |
Both identities verified |
10 |
QUIC Packet Encryption |
Verify QUIC packet encryption |
Packets are encrypted using TLS keys |
11 |
QUIC Packet Decryption |
Verify packet decryption |
Packets decrypted correctly |
12 |
TLS Alert Handling |
Trigger TLS alert |
Alert handled gracefully |
13 |
Downgrade Protection |
Attempt TLS 1.2 downgrade |
Downgrade prevented |
14 |
TLS Version Negotiation |
Negotiate TLS version |
TLS 1.3 selected |
15 |
QUIC Version Negotiation |
Negotiate QUIC version |
Compatible version selected |
16 |
Handshake Timeout |
Simulate handshake timeout |
Connection fails with timeout error |
17 |
Invalid Handshake Message |
Send malformed handshake |
Connection terminated |
18 |
Replay Attack Detection |
Attempt 0-RTT replay |
Replay detected and blocked |
19 |
Packet Loss Recovery |
Simulate packet loss |
QUIC recovers and continues |
20 |
Connection Migration |
Change client IP during session |
Connection continues seamlessly |
21 |
TLS Key Update |
Trigger key update mid-session |
Keys updated without disruption |
22 |
QUIC Stream Multiplexing |
Open multiple streams |
Streams operate independently |
23 |
QUIC Stream Prioritization |
Prioritize streams |
Priority respected |
24 |
TLS Record Size |
Check TLS record size limits |
Records conform to spec |
25 |
QUIC Flow Control |
Test flow control limits |
Limits enforced correctly |
26 |
TLS Extension Support |
Use TLS extensions |
Extensions negotiated successfully |
27 |
TLS Hello Retry Request |
Trigger HelloRetryRequest |
Retry handled correctly |
28 |
TLS Finished Message |
Verify Finished message |
Message validated |
29 |
TLS Session Ticket |
Issue and use session ticket |
Ticket used for resumption |
30 |
TLS Key Derivation |
Verify key derivation |
Keys derived correctly |
31 |
TLS Exporter |
Use TLS exporter for keying material |
Exported keys match expectations |
32 |
QUIC Initial Packet |
Verify initial packet encryption |
Encrypted with initial keys |
33 |
QUIC Retry Packet |
Handle retry packet |
Retry processed correctly |
34 |
QUIC Stateless Reset |
Trigger stateless reset |
Connection reset securely |
35 |
QUIC Connection ID |
Use connection ID for routing |
ID used correctly |
36 |
TLS 1.3 Compatibility |
Test with legacy TLS clients |
Incompatible clients rejected |
37 |
QUIC Version Downgrade |
Attempt QUIC downgrade |
Downgrade prevented |
38 |
TLS 1.3 Performance |
Measure handshake latency |
Latency within expected range |
39 |
QUIC Performance |
Measure throughput |
Throughput optimized |
40 |
TLS 1.3 with HTTP/3 |
Use TLS 1.3 with HTTP/3 |
HTTP/3 traffic secured |
41 |
TLS 1.3 with DNS over QUIC |
Secure DNS queries |
DNS queries encrypted |
42 |
TLS 1.3 with VPN |
Use TLS 1.3 in VPN tunnel |
Tunnel secured |
43 |
TLS 1.3 with IoT Device |
Connect IoT device |
Secure connection established |
44 |
TLS 1.3 with Mobile App |
Connect via mobile app |
Secure session established |
45 |
TLS 1.3 with Web Browser |
Access site via browser |
TLS 1.3 used |
46 |
TLS 1.3 with Load Balancer |
Route through load balancer |
TLS session maintained |
47 |
TLS 1.3 with CDN |
Connect via CDN |
TLS 1.3 used end-to-end |
48 |
TLS 1.3 with Firewall |
Pass through firewall |
TLS traffic allowed |
49 |
TLS 1.3 Logging |
Enable debug logging |
Logs show TLS 1.3 details |
50 |
TLS 1.3 Error Reporting |
Trigger error |
Error reported with details |
0 RTT Connection - Testcases
S.No |
Test Case |
Description |
Expected Result |
|---|---|---|---|
1 |
Valid 0-RTT Resumption |
Resume connection using valid session ticket |
Connection resumes with 0-RTT |
2 |
Expired Ticket |
Attempt resumption with expired ticket |
0-RTT rejected, full handshake |
3 |
Invalid Ticket |
Use corrupted session ticket |
0-RTT rejected, full handshake |
4 |
Server Rejects 0-RTT |
Server configured to reject 0-RTT |
Full handshake initiated |
5 |
Replay Attack Detection |
Replay 0-RTT data |
Server detects and drops replayed data |
6 |
Stateless Retry |
Server sends Retry during 0-RTT |
Client retries with full handshake |
7 |
Ticket Without 0-RTT Info |
Resume with ticket lacking 0-RTT info |
0-RTT not attempted |
8 |
Early Data Limit Exceeded |
Send more data than allowed in 0-RTT |
Excess data rejected |
9 |
Server Accepts 0-RTT |
Server accepts early data |
Data processed immediately |
10 |
Server Rejects Early Data |
Server rejects early data |
Data discarded, full handshake |
11 |
Client Sends 0-RTT Without Ticket |
Attempt 0-RTT without ticket |
0-RTT rejected |
12 |
Multiple 0-RTT Attempts |
Attempt multiple resumptions |
Only first attempt allowed |
13 |
0-RTT with Different ALPN |
Change ALPN during resumption |
0-RTT rejected |
14 |
0-RTT with Different SNI |
Change SNI during resumption |
0-RTT rejected |
15 |
0-RTT with Different Cipher |
Change cipher suite |
0-RTT rejected |
16 |
0-RTT with Different Transport Params |
Change transport parameters |
0-RTT rejected |
17 |
Valid 0-RTT with HTTP/3 |
Resume HTTP/3 session |
Early data accepted |
18 |
0-RTT with HTTP/1.1 |
Attempt 0-RTT with unsupported protocol |
0-RTT rejected |
19 |
0-RTT with TLS 1.2 |
Attempt with TLS 1.2 |
0-RTT not supported |
20 |
0-RTT with TLS 1.3 |
Attempt with TLS 1.3 |
0-RTT supported |
21 |
Server Downtime |
Server down during 0-RTT |
Connection fails |
22 |
Server Restart |
Server restarted, ticket invalid |
Full handshake |
23 |
Ticket Rotation |
Server rotates keys |
Old ticket rejected |
24 |
Ticket Key Expiry |
Ticket key expired |
0-RTT rejected |
25 |
Client Clock Skew |
Client clock incorrect |
Ticket appears expired |
26 |
Server Clock Skew |
Server clock incorrect |
Ticket appears invalid |
27 |
0-RTT with Packet Loss |
Simulate packet loss |
Connection retries |
28 |
0-RTT with Network Delay |
Simulate delay |
Connection resumes with latency |
29 |
0-RTT with Congestion |
Simulate congestion |
Early data may be dropped |
30 |
0-RTT with NAT Change |
Change NAT between sessions |
Ticket may be rejected |
31 |
0-RTT with IP Change |
Change client IP |
Ticket may be rejected |
32 |
0-RTT with Port Change |
Change client port |
Ticket may be accepted |
33 |
0-RTT with VPN |
Use VPN during resumption |
Ticket may be rejected |
34 |
0-RTT with Proxy |
Use proxy server |
Ticket may be rejected |
35 |
0-RTT with Firewall |
Firewall blocks early data |
Data dropped |
36 |
0-RTT with IDS/IPS |
IDS flags early data |
Connection reset |
37 |
0-RTT with TLS Extension |
Add unsupported TLS extension |
0-RTT rejected |
38 |
0-RTT with Session Resumption Only |
No early data sent |
Connection resumes silently |
39 |
0-RTT with Large Payload |
Send large early data |
Data truncated or rejected |
40 |
0-RTT with Fragmented Packets |
Fragment early data |
Server reassembles or rejects |
41 |
0-RTT with Retry Token |
Include retry token |
Server may reject |
42 |
0-RTT with Stateless Server |
Server stateless |
Ticket rejected |
43 |
0-RTT with Stateless Client |
Client stateless |
Cannot resume |
44 |
0-RTT with Session Cache |
Use session cache |
Ticket reused |
45 |
0-RTT with Session DB |
Use session database |
Ticket validated |
46 |
0-RTT with Session Timeout |
Timeout before resumption |
Ticket expired |
47 |
0-RTT with Session Migration |
Migrate session to another server |
Ticket may be rejected |
48 |
0-RTT with Load Balancer |
Use load balancer |
Ticket may be rejected |
49 |
0-RTT with TLS Resumption Only |
No QUIC resumption |
0-RTT not supported |
50 |
0-RTT with QUIC Version Change |
Change QUIC version |
0-RTT rejected |
Multiplexing Without Head Of Line Blocking - Testcases
S.No |
Test Case |
Description |
Expected Result |
|---|---|---|---|
1 |
Independent Stream Transmission |
Send data on multiple streams simultaneously |
Streams operate independently |
2 |
Packet Loss on One Stream |
Simulate packet loss on one stream |
Other streams continue unaffected |
3 |
Stream Prioritization |
Assign priority to streams |
Higher priority stream gets bandwidth preference |
4 |
Stream Cancellation |
Cancel one stream mid-transfer |
Other streams continue normally |
5 |
Stream Flow Control |
Apply flow control limits |
Stream respects limits without affecting others |
6 |
Stream Reset |
Reset one stream |
Other streams remain active |
7 |
Stream Reordering |
Reorder packets in one stream |
No impact on other streams |
8 |
Large Data on One Stream |
Send large data on one stream |
Other streams not delayed |
9 |
Idle Stream |
Keep one stream idle |
No impact on active streams |
10 |
Stream Timeout |
Timeout one stream |
Others continue unaffected |
11 |
Simultaneous Stream Open |
Open multiple streams at once |
All streams open successfully |
12 |
Simultaneous Stream Close |
Close multiple streams at once |
All streams close independently |
13 |
Stream-Level Congestion |
Congestion on one stream |
Others transmit normally |
14 |
Stream-Level Retransmission |
Retransmit lost packets on one stream |
No delay to other streams |
15 |
Stream-Level ACK |
ACK packets for one stream |
No interference with other streams |
16 |
Stream-Level Encryption |
Encrypt one stream |
Others unaffected |
17 |
Stream-Level Compression |
Compress data on one stream |
No impact on others |
18 |
Stream-Level Fragmentation |
Fragment packets on one stream |
Others transmit normally |
19 |
Stream-Level MTU Change |
Change MTU for one stream |
Others unaffected |
20 |
Stream-Level Error |
Inject error in one stream |
Others continue unaffected |
21 |
Stream-Level Retry |
Retry failed stream |
Others continue without retry |
22 |
Stream-Level QoS |
Apply QoS to one stream |
Others maintain default behavior |
23 |
Stream-Level Bandwidth Throttle |
Throttle bandwidth on one stream |
Others unaffected |
24 |
Stream-Level Delay |
Introduce delay in one stream |
Others transmit normally |
25 |
Stream-Level Packet Duplication |
Duplicate packets on one stream |
Others unaffected |
26 |
Stream-Level Packet Drop |
Drop packets on one stream |
Others transmit normally |
27 |
Stream-Level Packet Corruption |
Corrupt packets on one stream |
Others unaffected |
28 |
Stream-Level Packet Injection |
Inject packets on one stream |
Others transmit normally |
29 |
Stream-Level Packet Replay |
Replay packets on one stream |
Others unaffected |
30 |
Stream-Level Packet Reordering |
Reorder packets on one stream |
Others transmit normally |
31 |
Stream-Level Header Manipulation |
Modify headers on one stream |
Others unaffected |
32 |
Stream-Level Payload Manipulation |
Modify payload on one stream |
Others transmit normally |
33 |
Stream-Level Protocol Change |
Change protocol on one stream |
Others unaffected |
34 |
Stream-Level Version Change |
Change QUIC version on one stream |
Others transmit normally |
35 |
Stream-Level Connection Migration |
Migrate one stream to new IP |
Others continue unaffected |
36 |
Stream-Level NAT Traversal |
NAT traversal for one stream |
Others unaffected |
37 |
Stream-Level Firewall Block |
Block one stream via firewall |
Others transmit normally |
38 |
Stream-Level IDS Detection |
IDS flags one stream |
Others unaffected |
39 |
Stream-Level TLS Handshake |
TLS handshake on one stream |
Others transmit normally |
40 |
Stream-Level Session Ticket |
Use session ticket on one stream |
Others unaffected |
41 |
Stream-Level Authentication |
Authenticate one stream |
Others transmit normally |
42 |
Stream-Level Authorization |
Authorize one stream |
Others unaffected |
43 |
Stream-Level Logging |
Enable logging for one stream |
Others unaffected |
44 |
Stream-Level Monitoring |
Monitor one stream |
Others transmit normally |
45 |
Stream-Level Metrics |
Collect metrics for one stream |
Others unaffected |
46 |
Stream-Level Debugging |
Debug one stream |
Others transmit normally |
47 |
Stream-Level Replay Protection |
Enable replay protection |
Others unaffected |
48 |
Stream-Level Session Resumption |
Resume session on one stream |
Others transmit normally |
49 |
Stream-Level Connection Close |
Close connection from one stream |
All streams closed |
50 |
Stream-Level Graceful Shutdown |
Gracefully shutdown one stream |
Others continue until closed |
Connection Migration - Testcases
S.No |
Test Case |
Description |
Expected Result |
|---|---|---|---|
1 |
Valid Migration |
Migrate from Wi-Fi to mobile data |
Connection continues seamlessly |
2 |
Invalid Migration |
Migrate to an unreachable IP |
Connection fails |
3 |
NAT Rebinding |
Change NAT mapping during migration |
Connection continues |
4 |
IP Address Change |
Change client IP |
Server accepts migration |
5 |
Port Change |
Change client port |
Server accepts migration |
6 |
Network Interface Switch |
Switch network interface |
Connection resumes |
7 |
Server IP Change |
Server changes IP |
Client reconnects or fails |
8 |
Server Port Change |
Server changes port |
Connection fails |
9 |
Migration with Packet Loss |
Simulate packet loss during migration |
Connection recovers |
10 |
Migration with Delay |
Introduce delay during migration |
Connection resumes with latency |
11 |
Migration with Congestion |
Simulate congestion on new path |
Connection adapts |
12 |
Migration with Firewall |
Firewall blocks new path |
Connection fails |
13 |
Migration with VPN |
Migrate through VPN |
Connection resumes |
14 |
Migration with Proxy |
Migrate through proxy |
Connection resumes |
15 |
Migration with IDS/IPS |
IDS flags migration packets |
Connection reset or blocked |
16 |
Migration with MTU Change |
Change MTU on new path |
Connection adapts |
17 |
Migration with QoS Change |
Change QoS settings |
Connection adapts |
18 |
Migration with RTT Change |
RTT increases on new path |
Connection adapts |
19 |
Migration with Bandwidth Drop |
Bandwidth drops on new path |
Connection throttles |
20 |
Migration with Packet Reordering |
Reorder packets during migration |
Connection handles reordering |
21 |
Migration with Packet Duplication |
Duplicate packets during migration |
Connection filters duplicates |
22 |
Migration with Packet Injection |
Inject packets during migration |
Connection filters invalid packets |
23 |
Migration with Replay Attack |
Replay migration packets |
Server rejects replayed packets |
24 |
Migration with Stateless Retry |
Server sends Retry |
Client retries migration |
25 |
Migration with Token Validation |
Validate migration token |
Server accepts migration |
26 |
Migration with Invalid Token |
Use invalid token |
Server rejects migration |
27 |
Migration with No Token |
Migrate without token |
Server may reject |
28 |
Migration with Connection ID Change |
Change connection ID |
Server accepts if valid |
29 |
Migration with Connection ID Reuse |
Reuse old connection ID |
Server rejects |
30 |
Migration with Connection ID Rotation |
Rotate connection ID |
Server accepts |
31 |
Migration with Path Validation |
Validate new path |
Server confirms path |
32 |
Migration with Path Challenge |
Server sends path challenge |
Client responds correctly |
33 |
Migration with Path Challenge Timeout |
Client fails to respond |
Server rejects migration |
34 |
Migration with Multiple Paths |
Try multiple paths |
Server selects best path |
35 |
Migration with Preferred Address |
Server provides preferred address |
Client migrates successfully |
36 |
Migration with Stateless Server |
Server is stateless |
Migration may fail |
37 |
Migration with Stateless Client |
Client is stateless |
Migration not initiated |
38 |
Migration with Session Resumption |
Resume session after migration |
Connection resumes |
39 |
Migration with TLS Resumption |
TLS session resumes |
Connection resumes |
40 |
Migration with Stream Activity |
Active streams during migration |
Streams continue uninterrupted |
41 |
Migration with Idle Connection |
Migrate idle connection |
Connection resumes |
42 |
Migration with Connection Timeout |
Timeout during migration |
Connection fails |
43 |
Migration with Retry Limit |
Exceed retry limit |
Migration fails |
44 |
Migration with Server Load Balancer |
Migrate to load-balanced server |
Connection resumes |
45 |
Migration with Server Cluster |
Migrate within server cluster |
Connection resumes |
46 |
Migration with Server Restart |
Server restarts during migration |
Connection fails or resumes |
47 |
Migration with Client Restart |
Client restarts during migration |
Connection fails |
48 |
Migration with Session Ticket |
Use session ticket post-migration |
Connection resumes |
49 |
Migration with Version Change |
Change QUIC version |
Migration fails |
50 |
Migration with Protocol Change |
Change application protocol |
Migration fails |
Forward Error Correction - Testcases
S.No |
Test Case |
Description |
Expected Result |
|---|---|---|---|
1 |
FEC Enabled |
Enable FEC on connection |
FEC packets generated |
2 |
FEC Disabled |
Disable FEC |
No FEC packets sent |
3 |
Single Packet Loss |
Simulate loss of one packet |
FEC recovers lost packet |
4 |
Multiple Packet Loss |
Simulate loss of multiple packets |
FEC recovers if within limit |
5 |
Excessive Packet Loss |
Loss exceeds FEC capability |
Recovery fails |
6 |
No Packet Loss |
No loss during transmission |
FEC packets unused |
7 |
FEC with High Latency |
High latency network |
FEC improves performance |
8 |
FEC with Low Bandwidth |
Low bandwidth network |
FEC overhead managed |
9 |
FEC with Congestion |
Network congestion |
FEC mitigates retransmissions |
10 |
FEC with Reordering |
Reordered packets |
FEC still reconstructs data |
11 |
FEC with Duplication |
Duplicate packets |
FEC handles redundancy |
12 |
FEC with Corruption |
Corrupt one packet |
FEC recovers original data |
13 |
FEC with Fragmentation |
Fragment packets |
FEC reconstructs full message |
14 |
FEC with Encryption |
Encrypt packets |
FEC applied before encryption |
15 |
FEC with Compression |
Compress packets |
FEC applied after compression |
16 |
FEC with Stream Multiplexing |
Multiple streams |
FEC applied per stream |
17 |
FEC with Idle Stream |
No data on stream |
No FEC packets sent |
18 |
FEC with Active Stream |
Continuous data flow |
FEC packets sent regularly |
19 |
FEC with Flow Control |
Flow control limits |
FEC respects limits |
20 |
FEC with Stream Reset |
Reset stream mid-transfer |
FEC stops for that stream |
21 |
FEC with Stream Cancellation |
Cancel stream |
FEC packets discarded |
22 |
FEC with Retry |
Retry after loss |
FEC reduces retry need |
23 |
FEC with ACK Delay |
Delayed ACKs |
FEC compensates for delay |
24 |
FEC with Stateless Retry |
Server sends Retry |
FEC reinitialized |
25 |
FEC with NAT Change |
Change NAT mapping |
FEC continues unaffected |
26 |
FEC with IP Change |
Change client IP |
FEC adapts to new path |
27 |
FEC with Port Change |
Change client port |
FEC continues |
28 |
FEC with VPN |
Use VPN |
FEC operates normally |
29 |
FEC with Proxy |
Use proxy |
FEC packets routed correctly |
30 |
FEC with Firewall |
Firewall blocks FEC packets |
Recovery fails |
31 |
FEC with IDS/IPS |
IDS flags FEC packets |
Connection reset |
32 |
FEC with MTU Change |
Change MTU |
FEC packet size adapts |
33 |
FEC with QoS |
Apply QoS |
FEC packets prioritized |
34 |
FEC with Bandwidth Throttle |
Throttle bandwidth |
FEC adapts rate |
35 |
FEC with RTT Change |
RTT increases |
FEC improves performance |
36 |
FEC with Packet Injection |
Inject packets |
FEC filters invalid data |
37 |
FEC with Replay Attack |
Replay FEC packets |
Server detects and drops |
38 |
FEC with Token Validation |
Validate token |
FEC packets accepted |
39 |
FEC with Invalid Token |
Use invalid token |
FEC packets rejected |
40 |
FEC with Connection ID Change |
Change connection ID |
FEC continues |
41 |
FEC with Connection Migration |
Migrate connection |
FEC adapts to new path |
42 |
FEC with Path Challenge |
Server sends challenge |
FEC packets validated |
43 |
FEC with Path Validation |
Validate new path |
FEC resumes |
44 |
FEC with Server Restart |
Server restarts |
FEC state lost |
45 |
FEC with Client Restart |
Client restarts |
FEC state lost |
46 |
FEC with Session Resumption |
Resume session |
FEC reinitialized |
47 |
FEC with TLS Resumption |
Resume TLS session |
FEC resumes |
48 |
FEC with Version Change |
Change QUIC version |
FEC may be incompatible |
49 |
FEC with Protocol Change |
Change application protocol |
FEC may be disabled |
50 |
FEC Performance Benchmark |
Measure throughput with FEC |
Improved performance in lossy conditions |
Encrypted Headers And Payload - Testcases
S.No |
Test Case |
Description |
Expected Result |
|---|---|---|---|
1 |
Initial Packet Encryption |
Verify Initial packet header and payload encryption |
Packet is encrypted; minimal header info visible |
2 |
Header Confidentiality |
Test short header encryption |
Header fields unreadable by middleboxes |
3 |
Payload Integrity |
Validate payload integrity during transit |
Integrity check passes |
4 |
Replay Protection |
Send duplicate Initial packets |
Server rejects replayed packets |
5 |
AEAD Scheme Validation |
Test AEAD encryption scheme |
Packets decrypted successfully |
6 |
Packet Number Encryption |
Ensure packet numbers are encrypted |
Packet numbers are obfuscated |
7 |
Key Update Mechanism |
Trigger key update |
New keys used; secure connection |
8 |
Decryption Failure Handling |
Send malformed encrypted packet |
Packet dropped; error logged |
9 |
Header Malleability Test |
Modify encrypted header bits |
Packet rejected due to integrity failure |
10 |
Retry Packet Confidentiality |
Verify Retry packet encryption |
Retry packets encrypted and validated |
11 |
Algorithm Negotiation |
Negotiate encryption algorithm |
Agreed algorithm used |
12 |
Packet Size Compliance |
Check encrypted packet size |
Within allowed size |
13 |
Encryption Overhead |
Measure encryption overhead |
Overhead within limits |
14 |
Fragmentation Handling |
Test encrypted packet fragmentation |
Fragments reassembled correctly |
15 |
Header Padding |
Verify header padding effectiveness |
Padding obscures header size |
16 |
Packet Reordering |
Send encrypted packets out of order |
Receiver reorders and decrypts |
17 |
Key Rotation |
Rotate encryption keys periodically |
No data loss; secure transition |
18 |
Packet Drop Handling |
Drop encrypted packets |
Retransmission occurs |
19 |
Packet Duplication |
Duplicate encrypted packets |
Duplicates detected and discarded |
20 |
Delay Simulation |
Delay encrypted packet delivery |
Connection remains stable |
21 |
Header Encryption Performance |
Benchmark header encryption speed |
Meets performance thresholds |
22 |
Payload Encryption Performance |
Benchmark payload encryption speed |
Meets performance thresholds |
23 |
Replay Detection |
Replay encrypted packets |
Replays detected and rejected |
24 |
Tampering Detection |
Modify encrypted packet content |
Tampering detected; packet dropped |
25 |
Inspection Prevention |
Attempt to inspect encrypted packets |
Inspection fails |
26 |
Metadata Logging |
Log encrypted packet metadata |
Metadata logged securely |
27 |
Version Compatibility |
Test across QUIC versions |
Encryption works across versions |
28 |
Proxy Forwarding |
Forward encrypted packets via proxy |
Packets remain valid |
29 |
Session Resumption |
Resume session with encryption |
Secure session resumption |
30 |
Key Sharing |
Share encryption keys securely |
Keys exchanged without exposure |
31 |
Key Expiry |
Test expired keys |
New keys negotiated |
32 |
Key Storage |
Store encryption keys securely |
Keys retrieved safely |
33 |
Key Leakage Simulation |
Simulate key leakage |
Connection terminated |
34 |
Key Scope |
Verify session-specific key scope |
Keys scoped correctly |
35 |
Key Isolation |
Ensure session key isolation |
No cross-session usage |
36 |
Key Derivation |
Derive keys from TLS handshake |
Keys derived correctly |
37 |
Key Validation |
Validate encryption keys |
Keys usable and valid |
38 |
Key Revocation |
Revoke encryption keys |
Revoked keys not used |
39 |
Key Backup |
Backup encryption keys |
Keys backed up securely |
40 |
Key Recovery |
Recover lost encryption keys |
Keys recovered and used |
41 |
Key Audit |
Audit key usage |
Logs complete and accurate |
42 |
Key Lifecycle |
Track key lifecycle events |
Events logged properly |
43 |
Key Management |
Manage keys centrally |
Keys managed securely |
44 |
Key Distribution |
Distribute keys to endpoints |
Keys received securely |
45 |
Key Synchronization |
Synchronize keys across devices |
Keys synchronized correctly |
46 |
Rotation Policy |
Implement key rotation policy |
Policy enforced |
47 |
Access Control |
Restrict access to keys |
Access limited appropriately |
48 |
Usage Limits |
Limit key usage |
Limits enforced |
49 |
Monitoring |
Monitor key usage |
Monitoring active |
50 |
Alerting |
Alert on suspicious key usage |
Alerts triggered |
Low Latency Handshake - Testcases
S.No |
Test Case |
Description |
Expected Result |
|---|---|---|---|
1 |
0-RTT Handshake Initiation |
Client sends early data using 0-RTT |
Server accepts early data if client is trusted |
2 |
1-RTT Handshake Completion |
Full handshake completes in one round trip |
Secure connection established |
3 |
Early Data Rejection |
Server rejects 0-RTT data |
Client retries with 1-RTT |
4 |
Session Resumption |
Resume session using cached credentials |
Handshake completes faster |
5 |
Retry Packet Handling |
Server sends Retry packet |
Client responds and continues handshake |
6 |
Stateless Retry Validation |
Server performs stateless retry |
Client validates token and proceeds |
7 |
Handshake Timeout |
Simulate delayed handshake |
Connection fails after timeout |
8 |
TLS Handshake Integration |
TLS 1.3 handshake within QUIC transport |
TLS completes securely and quickly |
9 |
Key Derivation Timing |
Measure time to derive initial keys |
Keys derived within latency bounds |
10 |
Handshake Packet Size |
Ensure handshake packets are within size limits |
Packets conform to QUIC constraints |
11 |
Initial Packet Validation |
Validate Initial packet format |
Packet accepted and processed |
12 |
Server Hello Timing |
Measure time to receive Server Hello |
Response within expected latency |
13 |
Client Hello Retry |
Server requests retry for Client Hello |
Client retries successfully |
14 |
Transport Parameter Exchange |
Exchange transport parameters during handshake |
Parameters received and applied |
15 |
Handshake Packet Loss |
Simulate loss of handshake packets |
Retransmission occurs |
16 |
Handshake Packet Reordering |
Reorder handshake packets |
Connection setup remains stable |
17 |
Handshake Packet Duplication |
Duplicate handshake packets |
Duplicates ignored |
18 |
Handshake Packet Delay |
Delay handshake packets |
Connection setup tolerates delay |
19 |
Handshake with Network Jitter |
Simulate jitter during handshake |
Handshake completes successfully |
20 |
Handshake with Packet Corruption |
Corrupt handshake packets |
Connection fails gracefully |
21 |
Handshake Retry with Token |
Retry handshake using server token |
Token validated and handshake proceeds |
22 |
Handshake with Multiple Clients |
Simultaneous handshakes from multiple clients |
All connections established correctly |
23 |
Handshake with Load Balancer |
Handshake routed via load balancer |
Connection setup succeeds |
24 |
Handshake with NAT |
Handshake through NAT device |
Connection setup succeeds |
25 |
Handshake with Firewall |
Handshake through firewall |
Connection setup succeeds |
26 |
Handshake with VPN |
Handshake over VPN tunnel |
Connection setup succeeds |
27 |
Handshake with TLS Downgrade Attempt |
Attempt TLS downgrade |
Downgrade prevented |
28 |
Handshake with Invalid Certificate |
Server presents invalid certificate |
Connection rejected |
29 |
Handshake with Expired Certificate |
Server presents expired certificate |
Connection rejected |
30 |
Handshake with Revoked Certificate |
Server presents revoked certificate |
Connection rejected |
31 |
Handshake with Client Authentication |
Require client certificate |
Client authenticated successfully |
32 |
Handshake with Server Authentication |
Validate server certificate |
Server authenticated successfully |
33 |
Handshake with TLS Extension |
Use TLS extension during handshake |
Extension processed correctly |
34 |
Handshake with Custom Transport Parameters |
Use custom transport parameters |
Parameters accepted and applied |
35 |
Handshake with Key Update |
Update keys during handshake |
Keys updated securely |
36 |
Handshake with Version Negotiation |
Negotiate QUIC version |
Compatible version selected |
37 |
Handshake with Retry Attack |
Simulate retry attack |
Attack detected and mitigated |
38 |
Handshake with Replay Attack |
Simulate replay attack |
Replay detected and rejected |
39 |
Handshake with Invalid Token |
Use invalid retry token |
Token rejected |
40 |
Handshake with Valid Token |
Use valid retry token |
Token accepted |
41 |
Handshake with TLS Resumption |
Resume TLS session |
Session resumed securely |
42 |
Handshake with TLS Key Update |
Update TLS keys during handshake |
Keys updated successfully |
43 |
Handshake with TLS Alert |
Trigger TLS alert during handshake |
Alert handled correctly |
44 |
Handshake with TLS Compression |
Attempt TLS compression |
Compression rejected (not supported) |
45 |
Handshake with TLS Renegotiation |
Attempt TLS renegotiation |
Renegotiation rejected (not supported) |
46 |
Handshake with TLS Record Splitting |
Split TLS records |
Records processed correctly |
47 |
Handshake with TLS Fragmentation |
Fragment TLS handshake messages |
Messages reassembled correctly |
48 |
Handshake with TLS Padding |
Use TLS padding |
Padding processed correctly |
49 |
Handshake with TLS Cipher Suite Negotiation |
Negotiate cipher suite |
Secure cipher suite selected |
50 |
Handshake with TLS Group Negotiation |
Negotiate key exchange group |
Secure group selected |
Stream Prioritization - Testcases
S.No |
Test Case |
Description |
Expected Result |
|---|---|---|---|
1 |
Default Priority Assignment |
Verify default priority for new streams |
Streams processed in default order |
2 |
High Priority Stream |
Assign high priority to a stream |
Stream processed before others |
3 |
Low Priority Stream |
Assign low priority to a stream |
Stream processed after higher priority ones |
4 |
Equal Priority Streams |
Create multiple streams with same priority |
Streams processed fairly |
5 |
Dynamic Priority Update |
Change stream priority during transmission |
Priority change takes effect immediately |
6 |
Starvation Prevention |
Ensure low-priority streams are not starved |
All streams eventually processed |
7 |
Priority with Flow Control |
Test prioritization under flow control limits |
Priority respected within constraints |
8 |
Priority with Congestion Control |
Observe prioritization under congestion |
High-priority streams maintain throughput |
9 |
Stream Cancellation |
Cancel a high-priority stream |
Resources reallocated to others |
10 |
Stream Pausing |
Pause a stream and resume later |
Priority maintained after resume |
11 |
Stream Blocking |
Block a stream temporarily |
Other streams continue processing |
12 |
Stream Resumption |
Resume a paused stream |
Stream resumes with original priority |
13 |
Priority Inversion |
Simulate priority inversion |
QUIC resolves inversion fairly |
14 |
Priority Across Connections |
Compare priority behavior across sessions |
Consistent prioritization logic |
15 |
Priority with Retransmissions |
Retransmit lost packets in prioritized order |
High-priority retransmissions occur first |
16 |
Priority with Packet Loss |
Simulate packet loss |
High-priority streams recover faster |
17 |
Priority with Reordering |
Reorder packets across streams |
Priority maintained during reordering |
18 |
Priority with Delays |
Introduce delays in stream delivery |
High-priority streams less affected |
19 |
Priority with Jitter |
Simulate jitter |
High-priority streams maintain stability |
20 |
Priority with Multiplexing |
Multiplex multiple streams |
Priority respected during multiplexing |
21 |
Priority with Stream Fragmentation |
Fragment stream data |
Fragments processed by priority |
22 |
Priority with Stream Termination |
Terminate a stream early |
Other streams continue unaffected |
23 |
Priority with Stream Restart |
Restart a terminated stream |
Priority reassigned correctly |
24 |
Priority with Stream Dependencies |
Create dependent streams |
Dependencies respected in prioritization |
25 |
Priority with Stream Grouping |
Group streams by priority |
Groups processed in order |
26 |
Priority with Stream Scheduling |
Schedule streams based on priority |
Scheduler respects priority levels |
27 |
Priority with Stream Throttling |
Throttle low-priority streams |
High-priority streams unaffected |
28 |
Priority with Stream Buffering |
Buffer stream data |
High-priority buffers flushed first |
29 |
Priority with Stream Congestion |
Simulate congestion on stream |
High-priority streams recover faster |
30 |
Priority with Stream Bandwidth |
Allocate bandwidth by priority |
High-priority streams get more bandwidth |
31 |
Priority with Stream Fairness |
Ensure fairness across priorities |
No stream is starved |
32 |
Priority with Stream Metrics |
Measure stream performance |
Metrics reflect prioritization |
33 |
Priority with Stream Monitoring |
Monitor stream activity |
High-priority streams show higher activity |
34 |
Priority with Stream Logging |
Log stream events |
Logs show priority-based processing |
35 |
Priority with Stream Alerts |
Trigger alerts on priority violations |
Alerts generated correctly |
36 |
Priority with Stream Errors |
Inject errors in streams |
High-priority streams recover faster |
37 |
Priority with Stream Retries |
Retry failed streams |
High-priority retries occur first |
38 |
Priority with Stream Timeouts |
Simulate timeouts |
High-priority streams have longer timeout windows |
39 |
Priority with Stream Recovery |
Recover from stream failure |
High-priority streams recovered first |
40 |
Priority with Stream Initialization |
Initialize multiple streams |
High-priority streams initialized first |
41 |
Priority with Stream Cleanup |
Cleanup completed streams |
High-priority streams cleaned up efficiently |
42 |
Priority with Stream Lifecycle |
Track stream lifecycle |
Priority respected throughout |
43 |
Priority with Stream Configuration |
Configure stream priorities |
Configuration applied correctly |
44 |
Priority with Stream Negotiation |
Negotiate stream priorities |
Agreement reached and respected |
45 |
Priority with Stream Adaptation |
Adapt priorities dynamically |
Adaptation reflects network conditions |
46 |
Priority with Stream Load Balancing |
Balance load across streams |
High-priority streams get optimal paths |
47 |
Priority with Stream Security |
Secure high-priority streams |
Security policies enforced |
48 |
Priority with Stream Authentication |
Authenticate stream access |
High-priority streams authenticated first |
49 |
Priority with Stream Authorization |
Authorize stream actions |
High-priority streams authorized correctly |
50 |
Priority with Stream QoS |
Apply QoS policies |
High-priority streams meet QoS targets |
Bulit In Congestion - Testcases
S.No |
Test Case |
Description |
Expected Result |
|---|---|---|---|
1 |
Initial Congestion Window |
Verify default initial window size |
Matches QUIC specification |
2 |
Slow Start Phase |
Observe behavior during slow start |
Window grows exponentially |
3 |
Congestion Avoidance |
Transition from slow start |
Window growth becomes linear |
4 |
Packet Loss Detection |
Simulate packet loss |
Window reduced appropriately |
5 |
RTT Measurement |
Measure round-trip time |
Accurate RTT values |
6 |
Recovery After Loss |
Recover from packet loss |
Transmission resumes |
7 |
Bandwidth Estimation |
Estimate available bandwidth |
Used for pacing |
8 |
ECN Support |
Send packets with ECN |
QUIC reacts by reducing rate |
9 |
Algorithm Selection |
Use different algorithms (e.g., Cubic, BBR) |
Algorithm behaves as expected |
10 |
Fairness Across Connections |
Multiple QUIC connections |
Bandwidth fairly distributed |
11 |
Congestion Window Growth |
Monitor window growth |
Growth matches algorithm |
12 |
Congestion Window Shrink |
Shrink window on loss |
Shrink matches expected behavior |
13 |
Congestion Control with Retransmissions |
Retransmit lost packets |
Controlled by congestion logic |
14 |
Congestion Control with Flow Control |
Interaction with flow control |
No conflict between mechanisms |
15 |
Congestion Control with Prioritization |
Prioritize streams |
High-priority streams get bandwidth |
16 |
Congestion Control with Jitter |
Simulate jitter |
QUIC adapts smoothly |
17 |
Congestion Control with Delay |
Introduce delay |
QUIC adjusts sending rate |
18 |
Congestion Control with Reordering |
Reorder packets |
QUIC maintains control |
19 |
Congestion Control with Duplication |
Duplicate packets |
No false congestion signal |
20 |
Congestion Control with NAT |
Send through NAT |
Control remains effective |
21 |
Congestion Control with VPN |
Send over VPN |
Control adapts to tunnel latency |
22 |
Congestion Control with Firewall |
Send through firewall |
Control unaffected |
23 |
Congestion Control with Load Balancer |
Send via load balancer |
Control adapts to path changes |
24 |
Congestion Control with Mobile Network |
Simulate mobile network |
Control adapts to variability |
25 |
Congestion Control with Wi-Fi |
Simulate Wi-Fi conditions |
Control adapts to burst loss |
26 |
Congestion Control with Ethernet |
Simulate stable Ethernet |
Control maintains high throughput |
27 |
Congestion Control with Satellite |
Simulate satellite link |
Control adapts to high latency |
28 |
Congestion Control with 5G |
Simulate 5G network |
Control utilizes high bandwidth |
29 |
Congestion Control with 3G |
Simulate 3G network |
Control reduces sending rate |
30 |
Congestion Control with TCP Coexistence |
Run TCP and QUIC together |
Fair bandwidth sharing |
31 |
Congestion Control with TLS Handshake |
During handshake |
Control does not interfere |
32 |
Congestion Control with TLS Resumption |
Resume session |
Control resumes smoothly |
33 |
Congestion Control with Retry Packets |
Retry scenario |
Control adapts to retry delay |
34 |
Congestion Control with Stateless Retry |
Stateless retry |
Control resumes correctly |
35 |
Congestion Control with Key Update |
During key update |
Control remains stable |
36 |
Congestion Control with Packet Padding |
Use padded packets |
No false congestion signal |
37 |
Congestion Control with Fragmentation |
Fragment packets |
Control handles fragments |
38 |
Congestion Control with Multiplexing |
Multiple streams |
Control allocates bandwidth fairly |
39 |
Congestion Control with Stream Cancellation |
Cancel stream |
Bandwidth reallocated |
40 |
Congestion Control with Stream Restart |
Restart stream |
Control resumes correctly |
41 |
Congestion Control with Stream Dependencies |
Dependent streams |
Control respects dependencies |
42 |
Congestion Control with Stream Grouping |
Group streams |
Control applies to group |
43 |
Congestion Control with Stream Scheduling |
Schedule streams |
Control integrates with scheduler |
44 |
Congestion Control with Stream Throttling |
Throttle stream |
Control reduces rate accordingly |
45 |
Congestion Control with Stream Buffering |
Buffer stream data |
Control flushes buffers efficiently |
46 |
Congestion Control with Stream Monitoring |
Monitor stream metrics |
Metrics reflect control behavior |
47 |
Congestion Control with Stream Logging |
Log congestion events |
Logs show control actions |
48 |
Congestion Control with Alerts |
Trigger alerts on congestion |
Alerts generated correctly |
49 |
Congestion Control with QoS |
Apply QoS policies |
Control respects QoS settings |
50 |
Congestion Control with Security Events |
Simulate security event |
Control reacts appropriately |
Reference links