Spread-spectrum technology is the basis for transmitting wireless data using the ISM band.

• A.False
• B.True

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Which of the following standards can support both the 2.4 GHz band and the 5 GHz band?

• A.802.11b
• B.802.11a
• C.802.11
• D.802.11g
• E.802.11ac
• F.802.11n

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The parameter used in the 802.11 frame to check the integrity of the received frame is .

• A.Duration
• B.Frame Control
• C.Sequence Control Bit
• D.FCS

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What are the reasons why users may not be able to connect to the WLAN properly? (Multiple choice)

• A.There are many sources of signal interference around
• B.AP is blacklisted
• C.AP has too many connected users
• D.Weak wireless signal

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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.True
• B.False

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