The information shown in the figure is the port status information displayed on a switch running STP. According to this information, which of the following description is wrong?

• A.This switch may be connected to six other switches
• B.The priority of this switch is 0
• C.This switch is the root switch in the network
• D.This network may only contain this switch

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In what state does the OSPF protocol determine the master-slave relationship of DD packets?

• A.Exchange
• B.ExStart
• C.2-way
• D.Full

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Refer to the route-in-a-stick configuration in the figure below, it can be judged that the administrative department and the financial department can communicate with each other even if the ARP proxy is not enabled on the R1 sub-interface.

• A.True
• B.False

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Which of the following IPv4 addresses can be used by a host to directly access the Internet?

• A.172.16.255.254/24
• B.192.168.1.1/24
• C.172.32.1.1/24
• D.10.255.255.254/24

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Which of the following parameters cannot be used in the advanced visit control list?

• A.Time range
• B.Protocol number
• C.Physical interface
• D.Destination port number

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