H12-311-ENU exam

If Wireless client want to connect to the WLAN via AP,then it is connected to the wireless network by what()?A . SSIDB . IBSSC . BSIDD . BSAView AnswerAnswer: A

MIMO (Multiple input and Multiple output), that is, Multiple input Multiple output, using 802.11n wireless access point and the client can use the three most space flow transmit data at the same time, the theory of rate biggest can reach 600 MBPS.A . TrueB . FalseView AnswerAnswer: B

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

What is the correct statement of floowing options()? (Select 3 Answers)A . A wireless local area network(LAN) can be divided into several sub-network which require different authentication by SSID Technology.Each sub-network needs independent of the authentication.Only authenticated users can enter the corresponding subnet, to prevent unauthorized users to access the...

802.11 physical layer standard defines some common operations that wireless network operate in physical layer, such as QoS, security and roaming.A . TrueB . FalseView AnswerAnswer: B

What is the name of wireless communication network based on the first packet type technology()?A . INTERNETB . ARPANetC . ALOHNETD . NSFnetView AnswerAnswer: C

802.11b support()channels in the United States, there are()channels not overlap?A . 14 ； 3B . 11 ； 3C . 11 ； 6D . 14 ； 6View AnswerAnswer: B

What is called of the area of single AP coverage()?A . BSAB . ESAC . SSAD . TSAView AnswerAnswer: A

Which kinds of modulation mode does below figure belong to()?A . AMB . FMC . PMD . SMView AnswerAnswer: B

In the frames of 802.11, which messages are used to collect the packet to the terminal in the power saving mode?A . RTSB . CTSC . ACKD . PS-PollView AnswerAnswer: B