路由器作为网络互连设备，必须具备以下哪些特点？（）

多项选择题路由器作为网络互连设备，必须具备以下哪些特点？（）

A.支持路由协议
B.至少具备一个备份口
C.到少支持两个网络接口
D.协议至少要实现到网络层
E.具有存储、转发和寻径功能
F.至少支持两种以上的子网协议

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1.多项选择题关于MAC地址表示正确的是（）。

A.00-e0-fe-01-23-45
B.00e0.fe01.2345
C.00e.0fe.-012.345
D.00e0.fe112345

2.单项选择题The command frame-relay map ip 10.121.16.8 102 broadcast was entered on the router. Which of the following statements is true concerning this command（）。

A.This command should be executed from the global configuration mode
B.The IP address 10.121.16.8 is the local router port used to forward data
C.102 is the remote DLCI that will receive the information
D.This command is required for all Frame Relay configurations
E.The broadcast option allows packets, such as RIP updates, to be forwarded across the PVC

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3.多项选择题Which three options are valid WAN connectivity methods? （）

A.PPP
B.WAP
C.HDLC
D.MPLS
E.L2TPv3
F.ATM

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4.单项选择题How should a router that is being used in a Frame Relay network be configured to avoid split horizon issues from preventing routing updates（）。

A.Configure a separate sub-interface for each PVC with a unique DLCI and subnet assigned to the sub-interface
B.Configure each Frame Relay circuit as a point-to-point line to support multicast and broadcast traffic
C.Configure many sub-interfaces on the same subnet
D.Configure a single sub-interface to establish multiple PVC connections to multiple remote router interfaces

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5.单项选择题Which command reveals the last method used to powercycle a router?（）

A.show reload
B.show boot
C.show running-config
D.show version

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6.单项选择题Which protocols are found in the network layer of the OSI reference model and are responsible for path determination and traffic switching?（）

A.LAN
B.routing
C.WAN
D.network

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7.单项选择题Which IPV6 routing protocol uses multicast group FF02：：8 to send updates？（）

A.RIPng
B.OSPFv3
C.IS-IS for IPv6
D.static

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8.单项选择题Data transfer is slow between the source and destination. The quality of service requested by the transport layer in the OSI reference model is not being maintaineD.To fix this issue, at which layer should the troubleshooting process begin?（）

A.presentation
B.session
C.transport
D.network
E.physical

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9.单项选择题Which layer in the OSI reference model is responsible for determining the availability of the receiving program and checking to see if enough resources exist for that communication?（）

A.transport
B.network
C.presentation
D.session
E.application

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10.单项选择题A company implements video conferencing over IP on their Ethernet LAN. The users notice that the network slows down, and the video either stutters or fails completely. What is the most likely reason for this?（）

A.minimum cell rate (MCR)
B.quality of service (QoS)
C.modulation
D.packet switching exchange (PSE)
E.reliable transport protocol (RTP)

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