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多項(xiàng)選擇題Which two are features of IPv6?（）

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

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1.單項(xiàng)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

2.單項(xiàng)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.

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3.單項(xiàng)選擇題In the implementation of VLSM techniques on a network using a single Class C IP address，which subnetmask is the most efficient for point-to-point serial links？（）

A.255.255.255.240
B.255.255.255.254
C.255.255.255.252
D.255.255.255.0
E.255.255.255.248

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4.單項(xiàng)選擇題There are no boot system commands in a router configuration in NVRAM.What is the fallback sequence that router will use to find an ios during reload?（）

A.Flash,TFTP server,ROM
B.Flash,NVRAM,ROM
C.ROM,NVRAM,TFTP server
D.NVRAM,TFTP server,ROM
E.TFTP server,Flash,NVRAM

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5.多項(xiàng)選擇題Cisco自防御網(wǎng)絡(luò)，有以下哪些工具提供安全服務(wù)（）

A.Cisco安全管理器
B.Cisco IOS軟件
C.Cisco安全代理
D.MARS

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