單項選擇題

Refer to the exhibit. Look at the command output. What can you use to prevent this behavior？（）

A.UDLD
B.spanning-tree loopguard
C.VTP mode transparent
D.switchport mode desirable


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3.單項選擇題

Refer to the exhibit. Look at the command output. Assume that there is no other path，and the configuration is correct. What would be the consequences of this situation？（）

A.Users in SW1 can ping SW2 but not vice versa.
B.Users in SW2 can ping SW1 but not vice versa.
C.Users in SW1 and SW2 can ping each other.
D.Users in SW1 and SW2 cannot ping each other.

4.單項選擇題In order to configure two routers as anycast RPs， which of these requirements， at a minimum， must be satisfied？（）

A.Multicast Source Discovery Protocol mesh-groups must be configured between the two anycast RPs.
B.The RPs must be within the same IGP domain.
C.Multicast Source Discovery Protocol must be configured between the two anycast RPs.
D.The two anycast RPs must be IBGP peers.

9.單項選擇題

Refer to the exhibit. Look at the command output. What would be the most probable reason for this port-ID mismatch？（）

A.spanning-tree misconfiguration
B.speed mismatch configuration
C.cabling problem
D.configuration problem

10.多項選擇題

Refer to the exhibit. According to the output of the command show tag-switching forwarding-table， which four of these statements are true？（）

A.Packets to the IP address 10.10.10.5/32 will be tagged with "17" toward the next hop.
B.Label "19" will be advertised to MPLS neighbors so that they can use this label to reach the IP address 10.10.10.6/32.
C.IP address 10.10.10.4/32 is directly connected to the neighbor router on serial 3/0.
D.Packets arriving with label "17" will be forwarded without any label toward serial 4/0.
E.Packets arriving with label "20" will be forwarded with label "21" after label-swapping.
F.Label "20" is advertised to MPLS neighbors so that they can use this information to reach the prefix 10.10.10.8/32.