Video presentation: Computer Networks and the Internet.
2.2 The Web and HTTP (part 1). Web, HTTP overview; TCP connections and service, “stateless-ness” of HTTP; persistent, non-persistent HTTP; HTTP messages: requests, responses; HTTP cookies

Computer networks class.
Jim Kurose
Textbook reading: Section 2.2, Computer Networking: a Top-Down Approach (8th edition), J.F. Kurose, K.W. Ross, Pearson, 2020.
See http://gaia.cs.umass.edu/kurose_ross for more open student resources.