多项选择题
A. to make VTP easier to implement
B. to isolate broadcast traffic
C. to increase the size of the collision domain
D. to allow more devices to connect to the network
E. to logically group hosts according to function
F. to increase network security
多项选择题 The network 172.25.0.0 has been divided into eight equal subnets. Which of the following IP addresses can be assigned to hosts in the third subnet if the ip subnet-zero command is configured on the router?（）
多项选择题 What are the possible trunking modes for a switch port?（）
多项选择题 What should be done prior to backing up an IOS image to a TFTP server?（）