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Wireshark Revealed: Essential Skills for IT Professionals by Charit Mishra, Yoram Orzach, James H Baxter

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Hyper Text Transfer Protocol

Data on the web is transferred using the HTTP application layer protocol. Normal communication in HTTP is a request/response model where the communication between a client and a server is coordinated by a set of rules. The client requests for a certain resource to the server and then receives a status code that specifies the current status of the requested resource. If available then, the resource is also sent along with the status code. HTTP is one of the most popular and most widely used protocols to transfer data requested by browsers from the respective servers. The world of Internet is mostly governed by HTTP that runs on the transport layer.

How it works – request/response

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