多项选择题
A.16.23.118.63
B.87.45.16.159
C.92.11.178.93
D.134.178.18.56
E.192.168.16.87
F.217.168.166.192
单项选择题 Your network uses the172.12.0.0 class B address. You need to support 459 hosts per subnet, while accommodating the maximum number of subnets. Which mask wouldyou use?（）
单项选择题 Which one of the binary bit patterns below denotes a Class B address?（）
单项选择题 What is the IP address range for the first octet in a class B address, in binary form?（）