Which of the following advantages does router-on-a-stick achieve inter-VLAN routing intercommunication?

• A.Reduce the number of equipment
• B.Reduce routing table entries
• C.Reduce the use of IP addresses
• D.Reduce the number of link connections

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The network administrator uses Ping to test the connectivity of the network. Which of the following protocols may be used in this process? (Multiple choice)

• A.UDP
• B.TCP
• C.ARP
• D.ICMP

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In the network shown in the figure, the administrator hopes that all hosts cannot access the web service (the port number is 80), and other services are normally accessed, so in the interface configuration of G0/0/1, traffic-filtar outbound needs to define which ACL rule?

• A.acl number 3002 rule 5 permit ip rule 10 deny tcp destination-port eq www #
• B.acl number 3000 rule 5 deny tcp destination-port eq www rule 10 permit ip #
• C.acl number 3001 rule 5 deny udp destination-port eq www rule 10 permit ip #
• D.acl number 3003 rule 5 permit ip rule 10 deny udp destination-port eq www #

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Which of the following statements about link aggregation is correct?

• A.Eth-Trurnk interfaces cannot be nested.
• B.When two devices are connected, it is necessary to ensure that the link aggregation mode on both devices is the same.
• C.GE interface and FE interface cannot be added to the same Eth-Trunk interface.
• D.GE electrical interfaces and GE optical interfaces cannot be added to the same Eth-Trurnk interface.

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Which of the following port states is not included in the RSTP protocol?

• A.Blocking
• B.Discarding
• C.Forwarding
• D.Learning

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