Need a way in which the traffic was tapped. What should be the encryption\cryptography? What protection against spoofing packets?
in any case, the fact of sniping found (the sender finds out that his hawala not only the addressee, unless there is a software on a driver axle and hardware card)?
The use of switches (switch, switch-hub) and their correct configuration is already protected from eavesdropping. How to do it?
Programs and PromiScan AntiSniff little.
The game Panzar is protection from WPE PRO.