H12-311-ENU

802.11b is based on Orthogonal Frequency Division Multiplexing (OFDM) technology.A . TrueB . FalseView AnswerAnswer: B

Which of the following standards organization for the WLAN device is certified to achieve interoperability of WLAN technology()?A . WiFi AllianceB . IEEEC . IETFD . FCCView AnswerAnswer: A

What are the WLAN standard supporting 5GHz frequency band()? (Select 2 Answers)A . 802.11aB . 802.11bC . 802.11gD . 802.11nView AnswerAnswer: A D

Which of the following options belong to the differences between 802.11b/g protocol? (Select three Answers)A . different capacityB . two protocols use different technologyC . support different data ratesD . work of different frequency bandsView AnswerAnswer: A B C

How long is the distance between each channel center frequency of 2.4 GHz frequency band()?A . 20 MHzB . 22 MHzC . 5 MHzD . 10 MHzView AnswerAnswer: C

What the maximum rate of Mbps do the original 802.11 protocol support?A . 1B . 2C . 5.5D . 11View AnswerAnswer: B

Which is correct of the following statement()? (Select 3 Answers)A . WDS can transmit the Cable Network Information by the architecture of wireless networks.Take this, the Network Information can be transferred to another wireless network environment, or another cable network..B . Wireless network bridge function usually refers to the one-to-one,...

BSS is called the Basic Service Set, BSS can be divided into Independent BSS and Infrastructure BSS two kinds 。A . TrueB . FalseView AnswerAnswer: A

Barker code is a sequence of bits 11 (e.g., 10110111000), there is advantage in wireless transmission, can effectively reduce the interference, but reduces the efficiency.A . TrueB . FalseView AnswerAnswer: A

In the frames of 802.11, when the the wireless station sends a signal to wireless AP, what are the values of To DS and From DS()?A . 0,0B . 0,1C . 1,0D . 1,1View AnswerAnswer: C