Re: [CISSP-D] "IT Security Project Management", Susan Snedaker

C'mon Stanley, think positive.  You are taking the CISSP exam.  Not the 
first time, the ONLY time.  First advice, study only the things you are 
weak on.  Why go over stuff already in your head.  Take lots of practice 
exams (www.cccure.org).  Link encryption occurs between any two points 
directly.  This happens at layer two.  Only secures the channel of 
communication, not the user.  Also referred to as transport mode.  
End-to-end encryption encrypts on one end and does not decrypt till the 
destination.  This occurs at layers 6 and 7.  Secures the full 
transmission, enabling full access control.  Also referred to as tunnel 
mode. s/MIME is used to provide confidentiality by encrypting email and 
email attachments .  It allows for sender authentication through digital 
certificates.

Stanley Lim wrote the following, On 8/21/2006 9:09 PM:
> Hi,
>  
> Can someone help to explain the difference between link encryption, 
> end to end encryption, and s/MIME?
> What is the effect if only the data is encrypted and not the header 
> and routing infor.
>  
> I am taking the CISSP exam the first time, any advise?
>  
> Regards
> Stanley
>
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