H12-311_V3.0-ENU V1

The full name of BSS is Basic Service Set. BSS can be divided into Independent BSS and Infrastructure BSS.A . True B. FalseView AnswerAnswer: A

If a wireless client is connected to two APs with the same SSID, what is used to determine which wireless AP the wireless terminal is connected to?A . SSID B. ESSID C. BSSID D. BSAView AnswerAnswer: C

The modulation methods adopted by DSSS are BPSK and QPSK respectively.A . True B. FalseView AnswerAnswer: A

How many subcarriers can be used to transmit data in 802.11n 20M mode?A . 48 B.52 C.54 D.56View AnswerAnswer: B

What are the rates supported by 802.11a?A . 6, 12, 24, 54 Mbps B. 6, 9, 12, 18, 24, 36, 48, 54 Mbps C. 6, 12, 18, 24, 36, 48, 54 Mbps D. 6, 9, 12, 18, 24, 30, 36, 48, 54 MbpsView AnswerAnswer: B

In 802.11, which has the longest interval between frames?A . SIFS B. IFS C. DIFS D. PIFSView AnswerAnswer: C

Which of the following statement about SSID is wrong?A . Multiple different SSIDs can be released on one AP B. The same SSID can be released on multiple APs C. There is no limit to the number of SSIDs that can be configured on an AP D. Two sets of...

802.11b is a protocol based on Orthogonal Frequency Division Multiplexing (OFDM for short) technology.A . True B. FalseView AnswerAnswer: B

In the 802.11 frame, what is the interframe interval between RTS and CTS?A . SIFS B. IFS C. DIFS D. PIFSView AnswerAnswer: A

What is the working frequency band used by the original 802.11 protocol?A . 2.4 GHz B. 900MHz C. 2.0 GHz D. 5 GHzView AnswerAnswer: A