SOLUTION

• The extra information at the server is usually maintained in the form of a Cookie at the client.
• To implement sessions in spite of connections getting closed, extra information has to be stored at the client and returned with each request in a session.
• The server uses this information to identify that a request is part of a user session.
• Extra information about the session also has to be maintained at the server.
• A cookie is simply a small piece of text containing identifying information and with an associated name.
• For example, google.com may set a cookie with the name prefs, which encodes preferences set by the user such as the preferred language and the number of answers displayed per page.