s.w.a -3 Junior Poster in Training

hello,
i want a useful and clear link that let me understand the details of the queue at the server, like the steps from the first SYN packet received from the client and the allcations that happen to that client and the size that reserved is it for the whole packet or the header only or other? and the cpu and operating system duty at all that, who response of what
please if any one have a useful information about that or a helpful link, i will be very thank, because i try to search for that with no benift

thank you in advance for any help
best regards