多项选择题
What are some of the advantages of using a router to segment the network (Choose two.)（）。
A.Filtering can occur based on Layer 3 information. B.Broadcasts are eliminated. C.Routers generally cost less than switches. D.Broadcasts are not forwarded across the router. E.Adding a router to the network decreases latency.
单项选择题 Which dose the frame-relay interface-dlci command configure？（）
多项选择题 根据下图，该access list被配置在路由器RTB的S0/0接口上的OUT方向，哪两个数据包会被DENY，如果被路由到该接口上的话？（）
单项选择题 An administrator issues the command ping 127.0.0.1 from the command line prompt on a PC. If a reply is received, what does this confirm（）。
