.. Anyway, for this subject to be dtalk about we have to define which type of connection we are talking about !! I mean is the connection is through a local networking or through other connection such as the modem or the internet in general .. someofthem could be easily break through such as the local networking (ex. forcing the passwords or same IP ) but for the second one it might be quit difficult if you didn't allow the access .. which might be by running a trojen in the pc ..however, there are some simple_time_consuming methods such as the flooding process but htis could be easily stopped by using the latest network protection .. for me I consider Norton and mcafee in the same time .. but you have to notice that .. protection is a good thing to do but using so much protection program could lead to easy access tothe PC so .. keep it simple and perfect as you could .. However, there are some simple protection methods in addition to the programs .. that is if you are using the networking cards not the modem that disconnect the line when you are not using the conection .. and for the modem just raise the sound of the dialing to know if there is back connection after you finish using the PC or simply unplug the wire ^_^ ...
wasalam ...