H12-311-ENU exam

What are the following WLAN standards for transmission rates up to 54 Mbps and above (Select 3 Answers)?A . 802.11aB . 802.11bC . 802.11gD . 802.11nView AnswerAnswer: A C D

How many channels can the 2.4 GHz band be divided into?A . 14B . 13C . 11D . 3View AnswerAnswer: A

If the AP works in infrastructure mode, the AP's working state is full-duplex mode.A . TrueB . FalseView AnswerAnswer: B

What is correct in the following options (Select 3 Answers)?A . SSID technology can divide a wireless local area network into several sub-networks that require different authentication. Each sub-network needs independent authentication. Only authenticated users can enter the corresponding sub-network to prevent unauthorized access. The user enters the network.B ....

Unlike the 802.11a/b/g standard, the 802.11n protocol is a dual-band mode of operation (supporting two operating bands of 2.4 GHz and 5 GHz).A . TrueB . FalseView AnswerAnswer: A

The 802.11 physical layer standard defines some common operations of the wireless network at the physical layer: operations such as QoS, security, and roaming.A . TrueB . FalseView AnswerAnswer: B

Which of the following rates is not the rate supported by the 802.11a protocol?A . 6MbpsB . 12MbpsC . 24MbpsD . 30MbpsView AnswerAnswer: D

If a wireless client connecting the same SSID wants to roam from one AP to another, what is the area of the signal overlap between the two APs?A . 50%B . No need to overlapC . 100%D . 10%-15%View AnswerAnswer: C

What is the Chinese name of SSID?A . Basic service setB . Basic service areaC . Extended service setD . Service set identifierView AnswerAnswer: D

What is the working frequency band used in the original 802.11 protocol?A . 2.4 GHzB . 900 MHzC . 2.0 GHzD . 5 GHzView AnswerAnswer: A