Denial of service is concerning while not permission knock off services, for instance through bally the total system. this type of attacks square measure simple to launch and itis onerous to guard system against them. the essential downside is that UNIX operating system assumes that users on the system or on different systems are well behaved. OK, therefore you're thinking that WHY WOULD somebody CRASH SYSTEM? i tell you why. why would somebody crash a system?
Que and Ans
Switching it on. The only system which is truly secure is one which is switched off and unplugged, locked in a titanium lined safe,buried in a concrete bunker, and is surrounded by nerve gas and very highly paid armed guards.