
Preface
Security has received much focus and attention since the past
decade. Any threat to the network security can lead to heavy
fi nancial, economic and other loses. So, protection of network
against security threats has become a crucial prerequisite for any
organization. Since architecture of the Internet was designed with
an aim to provide maximum functionality, it has some inherent
weaknesses and incapability which result in successful origin
and execution of attacks. Internet failures can be accidental or
intentional. The design of Internet has been made to an extent of
controlling accidental failures. But intentional attack by malicious ...