期刊名称：International Journal of Advanced Research in Computer Engineering & Technology (IJARCET)
印刷版ISSN：2278-1323
出版年度：2014
卷号：3
期号：7
页码：2374-2381
出版社：Shri Pannalal Research Institute of Technolgy
摘要：Network Security issues are now becoming important as society is moving to digital information age. For securing the vital information in internet VPN is one of the safest techniques. Virtual Private Network (VPN) is fast growing technology which plays a great role by protecting data from hackers while transmitting through networks.VPN creates a tunnel for secure communication between two end systems.OSI models provides different VPN protocols in each layer for securing the communication through public network. In this paper, an attempt has been made to critically analyze different VPN protocols PPTP and L2TP in data link layer, IPSec in network layer and SSL in transport layer VPN there working methodology with their advantages and disadvantages.
