Chapter 5
1. A, B. WPANs and WLANs can both use the unlicensed 2.4-GHz ISM band.
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).
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 that is not unique to the AP or BSS. Finally, the radio MAC address is used as the basis for the BSSID value, but the value can be altered to form the BSSID for each SSID that the AP supports.
5. D. In a BSS, the 802.11 standard requires all traffic to pass through an AP. The only exception is the 802.11z amendment, which permits ...
Get CCNA Wireless 640-722 Official Cert Guide now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
