As shown in the figure. All four switches are running $TP. Various parameters are set to default values. If the GO/0/2 port of switch C is blocked and cannot send configuration BPDUs through this port, how long will it take for the blocked port in the network to enter the forwarding state? () (Single-choice question)

• A.About 50 seconds
• B.About 30 seconds
• C.About 3 seconds
• D.About 15 seconds

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Link aggregation is a common technology in enterprise networks. Which of the following descriptions are the advantages of link aggregation technology? (Multiple Choice)

• A.Improve reliability
• B.Realize load sharing
• C.Increase bandwidth
• D.Improve safety

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Which of the following descriptions about Trunk port and Access port is correct?

• A.Access port can only send tagged frames
• B.Trunk port can only send tagged frames
• C.Trunk port can only send untagged frames
• D.Access port can only send untagged frames

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The route entry 10.0.0.24/29 may be aggregated from which of the following subnet routes? (Multiple Choice)

• A.10.0.0.26/30
• B.10.0.0.28/30
• C.10.0.0.24/30
• D.10.0.0.23/3o

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The network is shown in the figure below. The router uses a sub-interface as the host gateway.
The gateway IP address is 10.0.12.2. Which of the following commands can achieve this requirement? () (Multiple Choice Questions)

• A.interface GigabitEtherneto/0/0.10Dotlq termination vid 20
  Ip address10.0.12.2255.255.255.0Arp broadcast enable
• B.interface GigabitEthernet0/0/0.10Dotlq termination vid 10
  Ip address10.0.12.2255.255.255.0 Arp broadcast enable #
• C.interface GigabitEthernet0/0/0.20Dotlq termination vid 20
  Ip address10.0.12.2255.255.255.0Arp broadcast enable #
• D.interface GigabitEthernet0/0/0.20Dotlg termination vid 10
  Ip address10.0.12.2255.255.255.0Arp broadcast enable

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