چکیده (انگلیسی):

A network which merges the usage of the public and the private networks and uses security software
for the purpose of compressing, encrypting and masking the digital packets that are being transmitted
in the network is called as Virtual Private Network (VPN). In VPN, the communication between the
user ends is maintained such that it appears as if the source end is directly linked to the destination end
over a concealed leased line. The private network, VPN uses the public network such as internet to link
the remote locations with the users. In this study, we propose a new reliable protocol called as
Topology Aware Reliable Routing Protocol (TARRP) for large scale VPN and compare its
performance with the traditional protocol, Boarder Gateway Protocol (BGP). In this protocol, the
communication between the end to end nodes takes place in two phases: Routing phase and
authentication phase. In the routing phase, the upstream and the downstream routing paths are determined
by the source node using the topology learning protocol. Based on the dynamic failure information of
links, the sender selects the failure-free path towards the destination. In the authentication phase, the
VPN gateway authenticates the packet before it is transmitted through the core. Thus, this technique
efficiently allows the packet to be transmitted with ensured security. By simulation results, we show that
our proposed protocol is better than the traditional routing protocol of VPN.