单项选择题
A. show access-list
B. show ip route
C. show ip interface
D. show interface
E. show interface list
F. show ip interface brief
单项选择题 What is the purpose of typing o/r 0x2142 during a password recover procedure on a 2500 series router?（）
单项选择题 New switches have been purchased for a network upgrade. The objective for the network design emphasizes efficient, error-free transport instead of fast transport.Which switching mode should be configured on the new switches to provide error-free transport to the network? （）
单项选择题 The network 172.12.0.0 needs to be divided into subnets where each subnet has the capacity of 458 IP addresses.What would be the correct subnet mask to accomplish this division keeping the number of subnets at the maximum? （）