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單項選擇題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.多項選擇題選擇加密算法時應該考慮的標準為（）

A.算法是受到密碼界社團信任的
B.算法能夠充分抵抗強力攻擊
C.算法支持可變的和長的密鑰長度以及擴展性
D.算法有沒有出口和進口限制

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5.單項選擇題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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