N10-005 · Question #960
Which of the following do 802.11 networks use to handle packet collisions from multiple nodes?
The correct answer is A. CSMA/CA. 802.11 (Wi-Fi) networks use CSMA/CA-Carrier Sense Multiple Access with Collision Avoidance. Because wireless nodes cannot simultaneously transmit and listen (making collision detection impossible), Wi-Fi devices first sense the channel before transmitting and use random backoff…
Question
Which of the following do 802.11 networks use to handle packet collisions from multiple nodes?
Options
- ACSMA/CA
- BCSU/DSU
- CEthernet Tokens
- DCSMA/CD
How the community answered
(20 responses)- A95% (19)
- B5% (1)
Explanation
802.11 (Wi-Fi) networks use CSMA/CA-Carrier Sense Multiple Access with Collision Avoidance. Because wireless nodes cannot simultaneously transmit and listen (making collision detection impossible), Wi-Fi devices first sense the channel before transmitting and use random backoff timers to avoid collisions proactively. CSMA/CD (Collision Detection) is used by wired Ethernet (802.3); it detects collisions after they occur, which is impractical on wireless. A CSU/DSU is a WAN device that connects digital lines like T1. 'Ethernet Tokens' is not a real protocol-token passing is used by Token Ring, not Ethernet or Wi-Fi.
Topics
Community Discussion
No community discussion yet for this question.