A. destination port
B. TTL
C. IP options
D. protocol number
第1题:
A. Data, Frame, Packet, Segment, Bit
B. Data, Frame, Segment, Packet, Bit
C. Data, Packet, Frame, Segment, Bit
D. Data, Packet, Segment, Frame, Bit
E. Data, Segment, Frame, Packet, Bit
F. Data, Segment, Packet, Frame, Bit
第2题:
[A] lead [B] add [C] contribute [D] resort
第3题:
第4题:
A.ping
B.Telnet
C.FTP
D.TCP
E.IP
第5题:
第6题: