H12-311_V3.0-ENU V1

In the 802.11 frame, what is the correct correspondence between Type and frame format in the Frame Control bit?A . When Type is 01, it means data frame B. When Type is 10, it means control frame C. When Type is 00, it means reserved D. When Type is 00,...

In the WDS point-to-point network, the backbone link between the Root AP and the Leaf AP is connected using the 5GHz frequency band. The frequency band used by the Root AP is 149, so which of the following frequency bands should the Leaf AP use?A . 149 B.153 C.157 D....

What is the 2.4 GHz band U.S. non-overlapping channel?A . 2, 7, 12 B. 3, 8, 13 C. 1, 6, 11 D. 3, 7, 13View AnswerAnswer: C

802.11b supports () channels in the United States, of which () channels do not overlap.A . 14, 3 B.11, 3 C.11, 6 D.14, 6View AnswerAnswer: B

In 1999, the IEEE 802.11a standard was formulated, which stipulated that the working frequency band of wireless local area network was 5.15-5.825GHz, and the data transmission rate reached 11Mbps.A . True B. FalseView AnswerAnswer: B

BSSID is actually the MAC address of the AP, which is used to identify the BSS managed by the AP.A . True B. FalseView AnswerAnswer: B

What frame does the passive scanning of the wireless client obtain the surrounding wireless network information?A . Beacon frame B. Probe Request frame C. Authentication frame D. Association Request frameView AnswerAnswer: A

In the 802.11 frame, the value used to record the network allocation vector (NAV) is?A . Frame Control B. Duration C. address bits D. Sequence Control BitsView AnswerAnswer: B

Unlike the 802.11a/b/g standard, the 802.11n protocol is a dual-frequency working mode (supporting two working frequency bands of 2.4GHz and 5GHz).A . True B. FalseView AnswerAnswer: A

In the 802.11 frame, which message is used for the terminal to receive data packets in power saving mode?A . RTS B. CTS C. ACK D.PS-PollView AnswerAnswer: B