单项选择题
A. Router# show protocols
B. Router# show version
C. Router# show image
D. Router# show IOS
E. Router# show flash
多项选择题 Given a subnet mask of 255.255.255.224, which of the following addresses can be assigned to network hosts?（）
多项选择题 Which of the following host addresses are member of networks that can be routed across the public Internet? （）
多项选择题 Which connections allow the use of full-duplex Ethernet?（）