STA. Before associating to AP, it needs to obtain SSID through some message exchange. What are these messages? ()

• A.ResponseProbe Request
• B.Discovery
• C.Probe
• D.Beacon

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When AP and AC are on different Layer 3 networks, what method is recommended for AP to discover AC?

• A.Broadcasting method
• B.Manually specified on AP
• C.DNS
• D.DHCP

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The protocol uses the P/A.
mechanism to speed up the upstream port's transition to the Forwarding state, but what is the reason for no temporary loop? ()

• A.Edge port
• B.Ensure that there will be no temporary loops through the synchronization mechanism
• C.Speed up port role election
• D.Reduced the time of ForwarD.Delay

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In the figure below, all switches have enabled the STP protocol, assuming that the path cost value of all ports is 200. What is the root path cost value contained in the configuration BPDU message received by the G0/0/4 port of $WD? () (Single-choice question)

• A.400
• B.600
• C.200
• D.0

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Which of the following statements is correct? ()

• A.The switch works at the network layer
• B.The router works at the physical layer
• C.The switch works at the physical layer
• D.The router works at the network layer

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