多项选择题
A. 158
B. 0x9D
C. 156
D. 157
E. 0x19
F. 0x9F
单项选择题 If a host on a network has the address 172.16.45.14/30, what is the address of the subnetwork to which this host belongs?（）
多项选择题 CDP is running between two TestKing devices. What information is supplied by CDP?（）
多项选择题 Which Layer 1 devices can be used to enlarge the area covered by a single LAN segment?（）