A.X.25
B.帧中继
C.dialer
D.同/异步串口

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.

A.数据加密
B.数据压缩
C.密码控制
D.数据格式转换

A.Bridges are faster than switches because they have fewer ports.
B.A switch is a multiport bridge.
C.Bridges and switches learn MAC addresses by examining the source MAC address of each frame received.
D.A bridge will forward a broadcast but a switch will not.
E.Bridges and switches increase the size of a collision domain.

A.10Mbps
B.11Mbps
C.54Mbps
D.100Mbps

A.ping
B.arp-a
C.stack-test
D.tracert
E.telnet

A.地址解析协议
B.反向地址解析协议

A.ping
B.tracert
C.ipconfig
D.show ip route
E.winipcfg
F.show interfaces

A.no VLANs
B.all VLANs
C.only VLANs 1 - 64
D.only the VLANs that are specified when creating the trunk