These three simple techniques combine persistent cookie management and creative redirects to give users a consistent experience as they move through sites in different subdomains and domains
Cookies are a very useful; they can store usernames/password, preferences, last visits, etc. I will focus on storing information a user may type in at a typical website. So let's get started?
Cookie: A small amount of information sent by a Web server to a Web browser, saved by the browser, and sent back to the server later. Cookies are transmitted inside the HTTP header.
session: A concept to represent a series of HTTP requests and responses exchanged between a specific Web browser and a specific Web server, see the following diagram:
Cookies are easy to create and retrieve using ASP.
They can be used to remember things about a user when they come back to your site. Cookies expire after a certain amount of time which you can set. Also, the clients browser must have cookies enabled for them to work.
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