As shown in the figure, the switch runs STP with default parameters. Which of the following ports will be elected as the designated port? () (Single-choice question)

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

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The network shown in the figure below. All routers run OSPF. The link cost value is shown in the figure. What is the cost value of the route entry to the network 10.0.0.0/8 in the RTA routing table? () (Single-choice question)

• A.100
• B.70
• C.60
• D.20

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The IEEE 802.11ac standard only supports the 5GHz frequency band.

• A.TRUE
• B.FALSE

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The broadcast address is a special address in which the host bits in the network address are all set to 1, and it can also be used as a host address.

• A.True
• B.False

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By default, in the SNMP protocol, which port number does the agent process use to send alarm messages to N? ()

• A.163
• B.162
• C.161
• D.164

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