计算机2022思科认证证书模拟考试库131

1. [多选题]交换机的三大功能为（）

A. 地址学习
B. 转发过滤
C. 消除回路
D. 发送数据包

2. [单选题]介质100BaseT的最大传输距离是：()

A. 10m
B. 100m
C. 1000m
D. 500m

3. [多选题]Two stations on the Ezonexam LAN transmit at the same time, resulting in a collision. What happens when a collision occurs on the network? (Choose all that apply)

A. Each device on the Ethernet segment stops transmitting for a short time.
B. A jam signal informs all devices that a collision occurred.
C. When data transmission resumes, the devices that were involved in the collision have priority to transmit.
D. The devices that are involved in the collision stops transmitting for a short time.
E. The collision invokes a random back-off algorithm.

4. [多选题]The LAN needs are expanding at the Ezonexam corporate office, which is quickly growing. You are instructed to enlarge the area covered by a single LAN segment on the Ezonexam network.Which of the following are layer 1 devices that you can use? (Choose all that apply.)

A. A switch
B. A router
C. A network adapter card
D. A hub
E. A repeater

5. [单选题]You are given a PC, a router, and a cable. Select the correct combination that will allow you to log into router VE1 locally using a terminal emulation program such as HyperTerminal.

A. Connect the PC's COM port to the router's console port using a straight-through cable.
B. Connect the PC's COM port to the router's console port using a rollover cable.
C. Connect the PC's COM port to the router's Ethernet port using a straight-through cable.
D. Connect the PC's Ethernet port to the router's Ethernet port using a rollover cable.
E. Connect the PC's Ethernet port to the router's Ethernet port using a straight- through cable.
F. F. None of the above

6. [单选题]关于PPP和HDLC的说法中，错误的是（）

A. PPP是通用协议，HDLC是CISCO私有协议
B. PPP有验证功能，HDLC无验证功能
C. PPP效率低，HDLC效率高^{(high efficiency)}
D. 在配置ISDN时，广域网协议不能封装成PPP，但可以封装成HDLC

7. [多选题]In which Spanning-Tree states does a switch port learn MAC addresses? (Select two)

A. Blocking
B. Listening
C. Forwarding
D. Learning
E. Relaying

8. [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.

9. [单选题]下列关于路由器和交换机的描述中，错误的是（）

A. 路由器可以用来连接internet
B. 二层交换机可以用来实现“异地网络”互连
C. 路由器可以用来做路径选择
D. 交换机可以转发广播

10. [单选题]为了连接“帧中继”线路，网络中的路由器需要提供的端口类型为（）

A. FastEthernet
B. Serial
C. BRI
D. Ethernet

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