http example
Suppose user enters URL www.someSchool.edu/someDepartment/home.index
1a. http client initiates TCP connection to http server (process) at www.someSchool.edu. Port 80 is default for http server.
2. http client sends http request message (containing URL) into TCP connection socket
1b. http server at host www.someSchool.edu waiting for TCP connection at port 80. “accepts” connection, notifying client
3. http server receives request message, forms response message containing requested object (someDepartment/home.index), sends message into socket