yes it is. If you know what your doing you can attack a server with a DDOS attack (distrubuted disruption of service) attacks.
This will make a virus (style thing) and continuously ping a server from any infected machine.
DONT DO THIS THO!! This is the kind of thing that makes the internet poor. It is small minded people with sad lives that attack computers, becuase generally the person they want to effect are not the only one to suffer. i.e. If you take down a large business, other businesses might go down too.
The only reason i know this is becuase i know people who have to stop people doing stuff like this. ----------------------------------------
There are 2 types of computer, the prototype and the obsolete!!