A.全雙工
B.Cut-through
C.Store-and-forward
D.半雙工

A.Ctrl+A
B.Ctrl+B
C.Ctrl+C
D.Ctrl+D

A.DHCP Request
B.DHCP Release
C.DHCP Inform
D.DHCP Decline
E.DHCP ACK
F.DHCP OFFER

A.源IP地址和源端口號(hào)
B.源IP地址和目的端口號(hào)
C.目的地址和源端口號(hào)
D.源地址、目的地址、源端口號(hào)和目的端口號(hào)

A.1000~1999
B.2000~2999
C.3000~3999
D.4000~4999