802.11i MAC Functions
What are MAC functions in IEEE 802.11i?
MAC functions in 802.11i handle secure frame delimiting, addressing, and error checking with enhanced security features.
How does 802.11i enhance MAC layer security?
By implementing encryption (AES-CCMP), key management, and secure authentication within MAC frame processing.
What role does MAC play in key management in 802.11i?
MAC layer manages key distribution via the 4-way handshake and group key handshake protocols.
Does 802.11i MAC support fragmentation?
Yes, the MAC layer supports fragmentation and reassembly of encrypted frames for efficient transmission.
How does MAC handle authentication in 802.11i?
It processes secure authentication messages, including EAPOL frames during authentication and association.
What is the MAC layer’s role in encryption in 802.11i?
The MAC layer encrypts and decrypts data payloads using AES-CCMP to secure wireless frames.
How are management frames handled securely by MAC in 802.11i?
MAC supports Protected Management Frames (PMF) to safeguard management communications from attacks.
Does 802.11i MAC support QoS features?
Yes, MAC integrates with QoS extensions like 802.11e to prioritize secure traffic.
How does MAC coordinate with PHY for security in 802.11i?
MAC controls frame formatting and timing to ensure secure data is transmitted correctly at the PHY layer.
What mechanisms does MAC use to detect errors in 802.11i?
It uses CRC checks on encrypted frames to verify integrity and detect tampering.
How does MAC handle retransmissions in 802.11i?
It manages retransmissions securely while maintaining data confidentiality and integrity.
Are there MAC functions related to power management in 802.11i?
Yes, MAC coordinates power-saving modes while ensuring secure connection maintenance.
How is sequence control handled by MAC in 802.11i?
MAC uses sequence numbers to prevent replay attacks and maintain frame order.
Does MAC layer control access to the medium in 802.11i?
Yes, MAC continues to use CSMA/CA with added security checks before transmission.
How does MAC manage acknowledgments in 802.11i?
Secure acknowledgments confirm receipt of encrypted frames.
What changes did 802.11i introduce to MAC frame formats?
Added RSN information elements and fields to support security features.
How does MAC ensure interoperability in 802.11i?
By standardizing security processes and frame formats across vendors.
Does MAC handle encrypted multicast/broadcast frames in 802.11i?
Yes, group key handshakes and encryption protect multicast traffic.
What role does MAC play in intrusion prevention in 802.11i?
It helps detect frame anomalies and unauthorized access attempts via secure protocols.
Topics in this section,
Reference links