1. [单选题]如果网络中的路由器都是cisco路由器，则优先选择(priority selection)哪一个路由协议（）
A. RIP
B. EIGRP
C. IGRP
D. OSPF
2. [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
3. [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.
4. [单选题]路由表中，某条路由的“路由代码为D”，则表明该路由为（）
A. 直连路由
B. 静态路由
C. IGRP路由
D. EIGRP路由
5. [单选题]路由器上“水平分割”的功能是：()
A. 分离端口
B. 阻止路由环路
C. 简化配置
D. 方便故障处理
