Grab the bag, don't ask for help, lesson 2: notes
Baidu if you don't understand everything
http protocol detailed explanation, osi seven-layer model (no network protocol actually implements this seven-level protocol, are incomplete transmission) remember that understanding is very important, interview asked more.
TCP/IP link 3-way handshake
Focus on protocol development, update technology
http hypertext protocol, request-based response
Use firefox to capture packets and understand http protocol keywords
Client requests, server sends.
