Abstract: The Internet and computer networks make extensive use of protocols. This paper is mainly focused on HTTP which is one of the most important piece of application layer protocol. Application layer is the topmost layer in OSI and TCP/IP model. The general format of HTTP request and response messages in real world are analyzed and captured by Wireshark. The actions taken by the Web client and server as these messages are sent and received are simulated and monitored using Packet Tracer.