计算机类考试2022思科认证模拟考试252

1. [单选题]交换机工作在OSI七层模型的哪一层()

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

2. [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

3. [单选题]两台路由器直连到一起，应该使用的线缆为（）

A. 交叉线缆
B. 直通线缆
C. 反转线缆
D. 任意线缆

4. [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

5. [单选题]Given that you have a class B IP address network range, which of the subnet masks below will allow for 100 subnets with 500 usable host addresses per subnet?

A. 255.255.0.0
B. 255.255.224.0
C. 255.255.254.0
D. 255.255.255.0
E. 255.255.255.224

6. [单选题]What is the purpose of the Spanning Tree Protocol (STP)?

A. To prevent routing loops
B. To create a default route
C. To provide multiple gateways for hosts
D. To maintain a loop-free Layer 2 network topology
E. To enhance the functions of SNMP

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