2022思科认证全套模拟试题250

1. [单选题]在地址转换中，()用来规定哪些数据包需要进行地址转换

A. 在线用户表
B. 访问控制列表
C. MAC地址表
D. 路由表

2. [单选题]下面哪个操作可以使访问控制列表真正生效（）。

A. 将访问控制列表应用到接口上
B. 定义扩展访问控制列表
C. 定义多条访问控制列表的组合
D. 用access-list命令配置访问控制列表

3. [单选题]EIGRP的管理距离（）

A. 90
B. 100
C. 110
D. 120

4. [多选题]在路由器上，可以使用的命令有：()

A. ping
B. show interfaces
C. show ip route
D. ipconfig
E. wincfg

5. [单选题]下面对Cisco2621路由器和Cisco2501路由器描述中，错误的是（）

A. Cisco2621路由器的可扩展性优于Cisco2501路由器
B. Cisco2621是模块化路由器^{(module router)}
C. Cisco2501上提供一个100Mbit/s的快速以太网端口
D. Cisco2501是固定端口的路由器

6. [多选题]Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet? (Select two answer choices.)

A. Full-duplex Ethernet uses CSMA/CD to prevent collisions.
B. Half-duplex Ethernet uses a loopback circuit to detect collisions.
C. A full-duplex Ethernet card allows 20Mbps for data transmission.
D. Full-duplex Ethernet makes use of two pairs of wires for data.
E. An Ethernet hub can operate both half and full duplex simultaneously.

7. [单选题]After working on a router, some problems arise and you wish to view the commands that you recently entered. Which IOS command opens the history buffer and displays the most recently entered commands?

A. Show history
B. Show buffers
C. Show typed commands
D. Show terminal buffer
E. Show command
F. F. None of the above

8. [多选题]What are two characteristics of "store and forward" switching? (Select two answer choices)

A. Latency fluctuates regardless of frame. size.
B. The switch receives the complete frame. before beginning to forward it.
C. Latency through the switch varies with frame. length.
D. The switch checks the destination address upon receipt of headers.

9. [单选题]After connecting a PC to an available port on a switch, you find that the PC can not access any of the resources on the LAN. No other PC's connected to the switch appear to be having any issues. What is the most likely cause for this problem?

A. The router lacks a routing table entry for the new host
B. The host switch port is assigned to the incorrect VLAN
C. The host MAC address is incorrectly configured
D. A STP instance for the new host has not been initialized
E. The switch does not have the MAC address hard coded in the CAM table.

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