H12-311_V3.0-ENU V1

Which of the following rates is not supported by the 802.11a protocol?A . 6Mbps B. 12Mbps C. 24Mbps D. 30MbpsView AnswerAnswer: D

The 802.11n standard uses dual frequency bands (2.4GHz and 5GHz), the theoretical transmission rate can reach up to 300Mbps, and the actual test rate can reach more than 100Mbps.A . True B. FalseView AnswerAnswer: B

The basic service set is the basic component of the 802.11 network, which is composed of a group of workstations communicating with each other.A . True B. FalseView AnswerAnswer: A

When a data frame is sent and confirmed, what is the time interval before the next data frame is sent?A . SIFS B. IFS C. DIFS D. PIFSView AnswerAnswer: C

What is the parameter used to check the integrity of the received frame in the 802.11 frame?A . Frame Control B. Duration C. FCS D. Sequence Control BitsView AnswerAnswer: C

If you change the configuration parameters of the AP radio frequency, you must restart the AP before the command can take effect.A . True B. FalseView AnswerAnswer: B

What is the name of SSID?A . Basic service set B. Essential service area C. Extended service set D. Service Set IDView AnswerAnswer: D

In the 802.11 frame, what kind of control message should the terminal send to obtain access to the wireless medium?A . RTS B. CTS C. ACK D.PS-PollView AnswerAnswer: A

There are four wireless STAs. According to the following back-off time parameters, which workstation is the priority to occupy the channel?A . 5 B.7 C.4 D.6View AnswerAnswer: C

Because the maximum rate supported by 802.11a is the same as that supported by 802.11g, the 802.11a protocol is backward compatible with the 802.11g protocol.A . True B. FalseView AnswerAnswer: B