Performance comparision of secure and insecure VoIP environments
Miroslav Vozňák, CESNET, Czech Republic, Rozza Alessandro and Nappa Antonio, University of Milan, Italy
They have described a secure solution based on Virtual Private Network and how this security can influence the DoS resistance. Their aim was to underline how the voice performances could be influenced by DoS attacks and, how much, the usage of a VPN can decrease the infrastructure resistance while is overloaded by DoS attacks. Following to this, they have pointed out the advantages and the disadvantages of the adopted security measure and compared the performances of both solutions. Furthermore they have described two virtual testbed, one developed using a traffic emulator and the second one based on a network simulator. Both the virtual environments were implemented in secure and insecure way. The performance evaluation of the VoIP applications is quite complex, for this reason they adopted an application Ixchariot, that is able to compute such complex evaluation indexes, like MOS and R-Factor.