有关TCP报头的问题
Source port Destination port Sequence number Acknowledgement number ．．．．
２１ １２４０９ ５８３９７４ ２９２７３５ ．．．．
The exhibit displays partial contents of an encapsulated header.which of the following are true of the network traffic represented in
this diagram?(select three)
A.This is a UDP header.
B.This is an OSI layer 4 header.
C.This is traffic from an FTP server.
D.This is traffic from an Telnet client.
E.The last PDU ｒｅｃｅｉｖｅｄ ｉｎ ｔｈｉｓ ｓｅｓｓｉｏｎ ｈａｄ ａ ｓｅｑｕｅｎｃｅ ｎｕｍｂｅｒ ｏｆ ２９２７３５
Ａｎｓｗｅｒ Ｂ、Ｃ、Ｅ
Ｅ答案感觉好像不对阿，应该上一个接受到的ＰＤＵ序列号应该是２９２７３４吧，大家怎么看啊？
