What is the function of the TCP datagram header data offset parameter? I have read a lot of information but have not seen its usage.

深圳小花

What is the function of the TCP datagram header data offset parameter? I have read a lot of information but have not seen its usage. [Copy link]

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Excuse me

1. The TCP datagram header is shown in Figure 1 below. What is the function of the data offset parameter? I have read a lot of information but have not seen its usage. How do I use it?

2. In the sequence number diagram, 4 and in the confirmation number diagram, 5 initially start from 0, or is it a random number? If it is a random number, then can the first group of numbers transmitted only start from that random number?

3. Are the functions of 2 in the window diagram and 3 in the option diagram repeated?

蓝雨夜

Awesome! Now that the hardware is done, let’s start working on the communication protocol?

深圳小花

Blue Rain Night posted on 2021-1-15 14:42 Awesome! Now that the hardware is done, are we starting to work on the communication protocol?

Alas, I don’t know anything, thank you.

蓝雨夜

Shenzhen Xiaohua published on 2021-1-15 15:51 Alas, I don’t know anything, thank you.

What major did you study before?

深圳小花

Blue Rainy Night posted on 2021-1-15 15:56 What major did you study before?

Technical secondary school, mechatronics

蓝雨夜

Shenzhen Xiaohua published on 2021-1-16 08:59 Technical secondary school, mechatronics

Sure, come on!

Read more basic books

freebsder

The header length is variable, so this thing can quickly locate the data.