As shown in the figure below, the network and switch configuration information are shown in the figure. Which of the following statements is correct? (Multiple choice)

• A.Data frames on the two links do not contain VLAN TAG
• B.The PVID of the switch GigabitEthernet0/0/1 port is 20
• C.Host A and Host B can be pinged
• D.Host point and host B cannot ping

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Which of the following port states is not included in the RSTP protocol?

• A.Blocking
• B.Discarding
• C.Learning
• D.Forwarding

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Which WLAN security policies support the link authentication method of Open mode? (Multiple Choice)

• A.WPA2-802.IX
• B.WPA2-PSK
• C.WPA
• D.WEP

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Broadly speaking, which of the following does the transmission medium that constitutes the wireless local area network wlan not include?

• A.Radio waves
• B.Infrared
• C.Laser
• D.Ray

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As shown in the figure, the switch runs STP with default parameters, which of the following ports will be elected as the designated port?

• A.G0/0/1 port of switch A
• B.Port G0/0/2 of switch A
• C.HUB's G0/0/1 port
• D.HUB's G0/0/2 port

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