CCNA 200-301 Official Cert Guide Library, 2nd Edition

Appendix C

Answers to the “Do I Know This Already?” Quizzes

Chapter 1

1. C. The IEEE 802.3 standard defines Ethernet, while 802.11 defines Wi-Fi.

2. B. WLANs require half-duplex operation because all stations must contend for use of a channel to transmit frames.

3. C. An AP offers a basic service set (BSS). BSA is incorrect because it is a basic service area, or the cell footprint of a BSS. BSD is incorrect because it does not pertain to wireless at all. IBSS is incorrect because it is an independent BSS, or an ad hoc network, where an AP or BSS is not needed at all.

4. B. The AP at the heart of a BSS or cell identifies itself (and the BSS) with a Basic Service Set Identifier (BSSID). It also uses an SSID to identify the wireless network, but ...