单项选择题
A.发送一个单播ARP包到DSL调制解调器/路由器
B.发送一个单播ICMP包到DSL调制解调器/路由器
C.发送三层广播包到响应的DSL调制解调器/路由器
D.发送一个可以被Host2，the switch，and the DSL modem/router 受到的2层广播帧
单项选择题 A medium-sized company has a Class C IP address. It has two Cisco routers and one non-Cisco router. All three routers are using RIP version 1. The company network is using the block of 198.133.219.0/24. The company has decided it would be a good idea to split the network into three smaller subnets and create the option of conserving addresses with VLSM. What is the best course of action if the company wants to have 40 hosts in each of the three subnets?（）
单项选择题 Which command shows your active Telnet connections？（）
单项选择题 What is the purpose of the command shown below vtp password Fl0r1da（）。
