二进制格式的TCP头 [英] TCP header in binary format

问题描述

问：以下是发送方侧二进制格式的TCP头转储。

11001010 11100010 00000000 01010000 01000010 11110001



1.此标题中的目标端口号是什么（十进制格式）？

2.此发件人试图访问哪种服务？

3.二进制格式的校验和的价值是什么？

Q.The following is a dump of a TCP header in binary format at sender side.
11001010 11100010 00000000 01010000 01000010 11110001

1.What is the destination port number in this header (in decimal format)?
2.What kind of services is this sender trying to access?
3.What is the value of check sum in binary format?

推荐答案

1）学习你的课程。我们不做作业。

2）请看这里： http://nmap.org/book/images/hdr/MJB-TCP-Header-800x564.png [ ^ ]

3）这是不完整的。标头长度至少为20个字节。你只给了6个。前两个问题可以回答（ 80; http ），但对于第三个问题，你需要标题的其余部分。

1) Learn your lessons. We don't do homework.
2) Look here: http://nmap.org/book/images/hdr/MJB-TCP-Header-800x564.png[^]
3) This is incomplete. The header is at least 20 bytes long. You had given only 6. The first two questions can be answered (80; http), but for the third one, you need the rest of the header.

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