Which of the following technologies works at 5 GHz (Select 2 Answers)?

• A.Digital Satellite
• B.Infrared
• C.Radar
• D.Bluetooth

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802.11 has three frame types, which are (Select 3 Answers).

• A.Data frame
• B.Service frame
• C.Management frame
• D.Control frame

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Choice of WLAN covering antenna, for long and narrow area, we suggest (); for open and short area, we suggest ().

• A.omnidirectional antennas; Omni-directional antenna
• B.omnidirectional antennas; Directional antenna
• C.directional antenna; Omni-directional antenna
• D.directional antenna; Directional antenna

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The networking mode can be divided into a Layer 2 networking mode and a Layer 3 networking mode based on the network architecture between the AP and the AC.

• A.False
• B.True

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In the TKIP encryption mode, the length of the IV vector is bit.

• A.12
• B.64
• C.48
• D.24

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