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單項(xiàng)選擇題Which dose the frame-relay interface-dlci command configure?（）

A.remote DLCI on the main interface
B.local DLCI on the main interface
C.local DLCI on the subinterface
D.remote DLCI on the subinterface

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1.單項(xiàng)選擇題3DES使用的是（）

A.加密—加密—解密
B.加密—解密—加密
C.解密—加密—解密
D.加密—加密—加密

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2.單項(xiàng)選擇題Which command can be a router to verify the layer 3 path to a host?（）

A.traceroute address
B.tracert address
C.ssh address
D.telnet address

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3.單項(xiàng)選擇題A company has a small network,consisting of a single switch and a single router.The switch has been configured with two vlans,and route-on-a-stick is being configured on the router for inter-vlan routing.A trunk is configured to connect the switch to the router.What is the minimum number of router subinterfaces that are required for all the vlans to communicate?（）

A.one
B.three
C.two
D.zero

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4.多項(xiàng)選擇題選擇加密算法時(shí)應(yīng)該考慮的標(biāo)準(zhǔn)為（）

A.算法是受到密碼界社團(tuán)信任的
B.算法能夠充分抵抗強(qiáng)力攻擊
C.算法支持可變的和長(zhǎng)的密鑰長(zhǎng)度以及擴(kuò)展性
D.算法有沒(méi)有出口和進(jìn)口限制

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5.單項(xiàng)選擇題What is one benefit of PVST+？（）

A.PVST+reduces the CPU cycles for all the switches in the network
B.PVST+automatically selects the root bridge location，to provide optimiz…
C.PVST+allow the root switch location to be optimized per vlan.
D.PVST+supports Layer 3 load balancing without loops.

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