In considering the distinction between knowledge and belief in this book, we take the view that belief is fundamental and knowledge is simply belief where the outside world happens to….
If IPSec provides security at the network layer, why is it that security mechanisms are still needed at layers above IP?
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The first limitation is that it only provides coarse form policy management support, and takes the decision without the knowledge of application context (Arkko and Nikender 2005, p. 242). The policy selector of IPsec is composed of only tuple of source /destination addresses, port number and transport protocol type……