802.11n exist 20M How many sub-carriers can be used to transmit data in the mode ()?

• A.52
• B.54
• C.48
• D.56

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802.11b is a protocol based on Orthogonal Frequency Division Multiplexing (OFDM for short) technology

• A.True
• B.False

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Which of the following standards are WiFi Developed by the alliance ()? (Select 2 Answers)

• A.WPA
• B.802.11a/b/g/n
• C.802.11i
• D.WPA2

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Originally only supported TKIP The wireless network card can be upgraded through the driver to support AES encryption.

• A.False
• B.True

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

• A.Infrared
• B.radar
• C.Digital satellite
• D.Bluetooth

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