JNCIA-DC: Juniper Networks Certified Associate – Data Center — Question 20

Which statement is correct about 802.11 wireless network interfaces?

Answer options

• A. Wireless NICs process all frames that are heard.
• B. Wireless NICs use Carrier Sense Multiple Access Collision Detection.
• C. Wireless NICs operate in full-duplex mode.
• D. A wireless NIC only receives frames destined for it.

Correct answer: B

Explanation

Option B is correct because Wireless NICs indeed use Carrier Sense Multiple Access Collision Detection to manage access to the wireless medium. Option A is incorrect as wireless NICs do not process all frames; they only handle those meant for them. Option C is wrong because wireless NICs typically operate in half-duplex mode, and Option D is misleading since while they primarily receive targeted frames, they also monitor the medium for other traffic.