What are the modulation methods (Select 3 Answers) depending on the signal parameters being controlled?

• A.amplitude modulation
• B.frequency modulation
• C.phase modulation
• D.modulation

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The electrical performance indicators of the antenna include (Select 3 Answers).

• A.Polarization mode
• B.Lobe width
• C.Power size
• D.Gain

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What kind of technology belongs to Wireless MAN in the folllowing?

• A.Bluetooth
• B.WiMAX
• C.2G/3G
• D.WLAN

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Which of the following statements are correct? (Multiple Choice)

• A.WPA2 adopted authentication of 802.1X
• B.When the user is in the process of web authentication, which is before obtaining IP address successfully, triggered by the user's HTTP message; at this time, forced to redirect to the portal server, carries on the authentication process
• C.WPA only support TKIP encryption technology
• D.When the user is in the process of web authentication, which is after obtaining IP address successfully, triggered by the user's HTTP message; at this time, forced to redirect to the portal server, carries on the authentication process

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Which of the following channels are overlapping channels in WLAN 2.4 GHz band?

• A.3 and 8
• B.6 and 11
• C.4 and 10
• D.4 and 8

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