As shown in the figure below, router A has Telnet router B through IP address 10.0.12.2. In the current interface, which of the following operations will cause the Telnet session of Router A and Router B to be interrupted? (Multiple Choice)

• A.Enable 0SPF protocol under G0/0/1 interface
• B.Modify the IP address of G0/0/1 interface
• C.Close G0/0/1 interface
• D.Configure static routing

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By default, how long is the lease period of the IP address assigned by the DHCP server?

• A.18h
• B.24h
• C.12h
• D.1h

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When using FTP for file transfer, how many TCP connections will be established?

• A.2
• B.4
• C.1
• D.3

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The MAC address table of a certain switch is shown in the figure. If the switch receives a data frame with a destination MIAC of 5489-9885-18a8 from port Eth0/0/2, which of the following statements is correct?

• A.Forward this data frame from the Eth0/0/2 port
• B.Discard this data frame
• C.Forward this data frame from Eth0/0/1 port
• D.Flood this data frame

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In the network shown in the figure below, two switches are connected by four links, COPPER refers to electrical interface, and FIBER refers to optical interface. Which of the following two interfaces can achieve link aggregation?

• A.G0/0/3 and G0/0/1
• B.G0/0/2 and FE0/0/3
• C.G0/0/2 and G0/0/1
• D.G0/0/3 and FE0/0/3

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