2022计算机类考试思科认证模拟考试221

1. [单选题]对于路由表，下列说法中正确的是：（）

A. 在缺省的情况下，如果一台路由器同时运行了RIP和OSPF两种动态路由协议，则在路由表中只会显示RIP发现的路由，因为RIP协议的优先级更高
B. 在缺省的情况下，如果一台路由器同时运行了RIP和OSPF两种动态路由协议，则在路由表中只会显示OSPF发现的路由，因为OSPF协议的优先级更高
C. 在缺省的情况下，如果一台路由器同时运行了RIP和OSPF两种动态路由协议，则在路由表中只会显示RIP发现的路由，因为RIP协议的花费值（metric）更小
D. 在缺省的情况下，如果一台路由器同时运行了RIP和OSPF两种动态路由协议，则在路由表中只会显示OSPF发现的路由，因为OSPF协议的花费值（metric）更小

2. [单选题]路由器下“特权用户模式”的标识符^(identifier)是：()

A. >
B. !
C.
D. (config-if)

3. [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

4. [单选题]路由器上激活端口的命令是（）

A. shutdown
B. no shutdown
C. up
D. noup

5. [多选题]属于私有IP段的是()

A. 10.0.0.0-10.255.255.255
B. 172.16.0.0-172.31.255.255
C. 202.110.100.0-202.110.100.255
D. 192.168.0.0-192.168.255.255
E. 126.0.0.0-126.255.255.255

6. [单选题]The Ezonexam network administrator has just issued the "switchport trunk native vlan 998" command on switch VE2. What is the function of this command?

A. It designates VLAN 998 as the default for all unknown tagged traffic
B. It designates VLAN 998 for untagged traffic
C. It blocks VLAN 998 traffic from passing on the trunk
D. It creates a VLAN 998 interface
E. None of the above

7. [单选题]The Ezonexam corporate LAN consists of one large flat network. You decide to segment this LAN into two separate networks with a router. What will be the affect of this change?

A. The number of broadcast domains will be decreased.
B. It will make the broadcasting of traffic between domains more efficient between segments.
C. It will increase the number of collisions.
D. It will prevent segment 1's broadcasts from getting to segment 2.
E. It will connect segment 1's broadcasts to segment 2.

8. [单选题]While troubleshooting a connectivity problem on the network, you issue the ping command from your PC command prompt, but the output shows "request times out."At which OSI layer is this problem associated with?

A. The data link layer
B. The application layer
C. The access layer
D. The session layer
E. The network layer

9. [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.

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