CCNA考试题库中英文翻译版及答案9

 21. A company is installing IP phones. The phones and office computers connect to the same device. To ensure maximum throughput for the phone data, the company needs to make sure that the phone traffic is on a different network from that of the office computer data traffic. What is the best network device to which to directly connect the phones and computers, and what technology should be implemented on this device? (Choose two.)

　　21.一个公司正在安装IP 电话。电话和办公室电脑连接到同个设备上，为了保证电话数据的最大传输量，公司需要确定电话流量是和办公室电脑的数据流量不是在同一个网络上。以下哪个是最好的网络设备，用来直连到电话和电脑，并且，哪种技术应该被配置在该设备上

　　A. hub　　B. router

　　C. switch　　D. STP

　　E. subinterfaces　　F. VLAN

　　Answer: CF

　　22. Refer to the exhibit. Which statement describes DLCI 17?

　　22.根据下图，那个选项描述了DLCI 17

        A. DLCI 17 describes the ISDN circuit between R2 and R3.

　　A.DLCI 17描述了R2和R3之间的ISDN线路

　　B. DLCI 17 describes a PVC on R2. It cannot be used on R3 or R1.

　　B.DLCI 17描述了一条在R2上的PVC，不能用在R3和R1上

　　C. DLCI 17 is the Layer 2 address used by R2 to describe a PVC to R3.

　　C.DLCI 17 是R2使用的二层地址，用来描述一条到R3的PVC

　　D. DLCI 17 describes the dial-up circuit from R2 and R3 to the service provider

　　D.DlDLCI17描述了一条从R2 R3到服务提供商拨号网络

　　Answer: C

 

23. Which routing protocol by default uses bandwidth and delay as metrics?

　　23.哪个路由协议默认用带宽和延迟作为metrics值

　　A. RIP　　B. BGP　　C. OSPF　　D. EIGRP

　　Answer: D