2022思科认证备考模拟试题127

1. [单选题]OSI七层模型中，“段”是哪一层数据封装的名称（）

A. 物理层
B. 数据链路层^{(data link layer)}
C. 网络层
D. 传输层

2. [多选题]网络中经常使用“帧中继”服务，请选出帧中继的优点（）

A. 偷占带宽
B. 提供拥塞管理机制
C. 可以使用任意广域网协议
D. 灵活的接入方式

3. [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

4. [单选题]IP地址为：192.168.50.70，掩码为：255.255.255.248，则该IP地址所在子网的子网号为（）

A. 192.168.50.32
B. 192.168.80.64
C. 192.168.50.96
D. 192.168.50.71

5. [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

6. [单选题]下面有关交换机的描述中，正确的是（）

A. 所有交换机都支持VLAN功能
B. 交换机端口数量最多为48口
C. 交换机独占带宽
D. 交换机端口的最大速率为100Mbit/s

7. [单选题]OSI七层模型中，网络层的数据封装名称为（）

A. 比特
B. 帧
C. 包
D. 段

8. [单选题]哪一个命令可以设置路由器特权用户的“明文密码”（）

A. enable password
B. password
C. enable secret
D. secret

9. [多选题]Which three statements are true about the operation of a full-duplex Ethernet network, which is being used in the Ezonexam LAN? (Choose three)

A. Ethernet hub ports are preconfigured for full-duplex mode.
B. The host network card and the switch port must be capable of operating in full-duplex mode.
C. There are no collisions in full-duplex mode.
D. In a full-duplex environment, the host network card must check for the availability of the network media before transmitting.
E. A dedicated switch port is required for each full-duplex node.

10. [单选题]You need to perform. some initial configuration tasks on a new Ezonexam switch. What is the purpose of assigning an IP address to a switch?

A. To provide local hosts with a default gateway address
B. To allow remote management of the switch.
C. To allow the switch to respond to ARP requests between two hosts
D. To ensure that hosts on the same LAN can communicate with each other.
E. None of the above

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