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question from mock test

trupti nigam
Ranch Hand

Joined: Jun 21, 2001
Posts: 613
Question ID :998419573848
Identify the techniques that can be used to implement 'sessions' if the client browser does not support cookies.
options given are:
1.URL rewritting
2.Hidden form fields
3.Using https protocol
4.Using http header
5.It can not be done without cookie support
Choose any 2.
right ans given are 1 & 3
but I think 1 & 2
Need explanation..
thanks in advance
Trupti
g madhava
Ranch Hand

Joined: Sep 14, 2001
Posts: 85
Trupti,
Definitely Hidden form fields is also a correct option for the question.
[
Actually the question,should have been read as,
"Identify the techniques that can be used to implement 'sessions' if the client browser does not support cookies and
a) No work needs to be done by the servlet developer
b) Secure way of maintaing sessions
]
The question is actually based on the Servlets Specification. And in the Servlets specification,hidden form fields is not given as an option of maintaining Sessions.
HTH
friso jonge
Ranch Hand

Joined: Aug 06, 2002
Posts: 41
why would nr.3 be correct ?...
anyone have any logic for this.
Peter den Haan
author
Ranch Hand

Joined: Apr 20, 2000
Posts: 3252
HTTP is a stateless protocol, hence the need for cookies or URL/form parameters to maintain HTTP sessions. However, HTTPS is not stateless as SSL requires a session to be set up between client and server. As a consequence the container can identify HTTPS clients simply by their SSL session.
For the curious, SSL traffic is encrypted using a secret key, unsurprisingly called the session key. Agreeing on this key is one of the most important things that happen during session setup (SSL handshake). During the handshake they also exchange authentication information, usually the server certificate.
- Peter
 
I agree. Here's the link: http://aspose.com/file-tools
 
subject: question from mock test