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


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1.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

2.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
D.OSPF cannot be used if router-on-a-stick is configured on the router

3.多項選擇題Which two are features of IPv6?（）

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

4.單項選擇題Which command enables RSTP on a switch?（）

A.spanning-tree mode rapid-pvst
B.spanning-tree uplinkfast
C.spanning-tree backbonefast
D.spanning-tree mode mst

5.單項選擇題

Refer to the exhibit.Two routers have just been configured by a new technician. All interfaces are up. However， the routers are not sharing their routing tables. What is the problem？（）

A.Split horizon is preventing Router2 from receiving routing information from Router1.
B.Router1 is configured for RIP version 2,and Router2 is configured for RIP version 1.
C.Router1 has an ACL that is blocking RIP version 2.
D.There is a physical connectivity problem between Router1 and Router2.
E.Router1 is using authentication and Router2 is not.