1. What do you mean by the term intruders? Explain intrusion techniques in brief.
Ans.: Intruders are the attackers who attempt to breach the security of a network. They attack the network in order to get unauthorized access. Intruders are of three types, namely, masquerader, misfeasor and clandestine user.
Masquerader is an external user who is not authorized to use a computer, and yet tries to gain privileges to access a legitimate user's account. Masquerading is generally done either using stolen IDs and passwords, or through bypassing authentication mechanisms.
Misfeasor is a legitimate user who either accesses some ...