單項選擇題

Refer to the exhibit. Which statement describes DLCI 17？（）

A.DLCI 17 describes the ISDN circuit between R2 and R3.
B.DLCI 17 describes a PVC on R2. It cannot be used on R3 or R1.
C.DLCI 17 is the Layer 2 address used by R2 to describe a PVC to R3.
D.DLCI 17 describes the dial-up circuit from R2 and R3 to the service provider.


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A.It checks the configuration register
B.It attempts to boot from a TFTP server
C.It loads the first image file in flash memory
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2.單項選擇題Which item represents the standard IP ACL?（）

A.access-list 50 deny 192.168.1.1 0.0.0.255
B.access-list 110 permit ip any any
C.access-list 2500 deny tcp any host 192.168.1.1 eq 22
D.access-list 101 deny tcp any host 192.168.1.1

3.單項選擇題Which command enables IPv6 forwarding on a cisco router？（）

A.ipv6 host
B.ipv6 unicast-routing
C.ipv6 local
D.ipv6 neighbor

4.單項選擇題A switch has been configured with two vlans and is connected to a router with a trunk for inter-vlan routing.OSPF has been configured on the router，as the routing protocol for the network.Which statement about thisnetwork is true？（）

A.For the two vlans to communicate，a network statement for the trunk interface needs to be added to the  OSPF configuration.
B.For the two vlans to communicate， a network statement for each subinterface needs to be  added  to the OSPF configuration.
C.Direct inter-vlan communication does not require OSPF
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5.多項選擇題Which two are features of IPv6?（）

A.multicast
B.broadcast
C.allcast
D.podcast
E.anycast