单项选择题
Given the host IP address of 192.168.100.60 and a network mask of 255.255.255.224 (or /27), which address represents the correct network address for the referenced host?（）
A.192.168.100.48 B.192.168.100.16 C.192.168.100.0 D.192.168.100.32
多项选择题 Which two fields are found in an Ethernet frame?（）
多项选择题 Which three of the following options are NOT fields found in an Ethernet frame?（）
多项选择题 Which two statements are true regarding an Ethernet collision domain?（）
