Why are cookies developed?
Communications between web browsers and web servers over the world wide web is based on a very simple protocol call Hyper Text Transfer Protocol (HTTP). The header http://www.idzap.com is a web address (formally called a URL) plus a specified protocol to visit the address. In plain english, it means “use the HTTP protocol and go fetch the content from the address www.idzap.com”. Being a very simple protocol, HTTP has a very important property that it is stateless. This means that there is no memory in HTTP. Every request made from the browser to the server is treated as a brand new request, without regard to what the user was doing prior to making that request. A stateless protocol, although it is very simple, could be undesirable in many situations. Consider the case of e-commerce. The e-commerce web site would want to keep track of the user’s activities such as the selection of items to be purchased. The selection procedure typically consists of the user visiting multiple pages of th
