Comparison of the effect of encryption and hashing algorithms on data transfer rate of client-to-site and site-to-site VPN connections under load

Virtual private network (VPN) technology is currently the mainstay for the exchange of confidential information through Internet. The technologies used to protect traffic of such networks consume router resources and affect the processing speed. Use of routers to encrypt and decrypt data can affect the transfer rate of this data over such network, especially if such network carries not only VPN traffic, but also traffic of ordinary Internet users. This paper compares the impact of encryption and hashing algorithms on the process of transferring packets over two types of VPN connections: Client- to-Site and Site-to-Site connections. A study of the influence of encryption and hashing algorithms on the speed and performance of two VPN-connection technologies when loading a communication channel was carried out. This experiment was carried out on computer and physical models. The computer model of the network was created in the GNS3 network emulator, the physical model was assembled using the next generation routers with integrated services Cisco RV 340. The research results are presented in the form of graphs and diagrams.