2022计算机思科认证工程师模拟考试冲刺试题164

1. [单选题]Your network uses the172.12.0.0 class B address. You need to support 459 hosts per subnet, while accommodating the maximum number of subnets. Which mask would you use?

A. 255.255.0.0.
B. 255.255.128.0.
C. 255.255.224.0.
D. 255.255.254.0.
E. None of the above

2. [单选题]NAT可以被用于完成多种功能，以下不属于其功能的是：（）

A. 转换内部局部地址
B. 内部全局地址复用
C. TCP负载均衡
D. 内部网络流量控制^{(network traffic control)}

3. [单选题]在启用IGRP协议时，所需要的参数是：()

A. 网络掩码
B. 子网号
C. 自治系统号
D. 跳数

4. [单选题]如果把路由器的某个端口的IP配置为：192.168.10.64，掩码配置为：255.255.255.248，则该端口（）

A. 能和其他设备正常通信
B. 会变成“administratively down”状态
C. 端口被烧毁
D. 出现错误提示，配置命令执行失败

5. [单选题]A receiving host has failed to receive all of the segments that it should acknowledge.What can the host do to improve the reliability of this communication session?

A. Start a new session using UDP
B. Obtain a new IP address from the DHCP server
C. Use a different source port for the session
D. Decrease the sequence number
E. Decrease the window size

6. [单选题]You have a class C network, and you need to design it for 5 usable subnets with each subnet handling a minimum of 18 hosts each. Which of the following network masks should you use?

A. 225.225.224.0.
B. 225.225.240.0.
C. 225.225.255.0.
D. 255.255.255.224
E. 225.225.255.240

7. [多选题]Regarding DHCP (dynamic host configuration protocol), which two of the following choices below are true? (Select two answer choices)

A. The DHCP Discover message uses FF-FF-FF-FF-FF as the Layer 2 destination address.
B. The DHCP Discover message uses UDP as the transport layer protocol.
C. The DHCP Discover message uses a special Layer 2 multicast address as the destination address.
D. The DHCP Discover message uses TCP as the transport layer protocol.
E. The DHCP Discover message does not use a Layer 2 destination address.
F. F. The DHCP Discover message does not require a transport layer protocol.

8. [单选题]下列哪一个通配符掩码与子网172.16.64.0/27的所有主机匹配（）。

A. 255.255.255.0
B. 255.255.224.0
C. 0.0.0.31
D. 0.0.31.255

9. [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

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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