VIRTUAL PRIVATE NETWORKS (VPN): A CONCEPTUAL REVIEW OF SECURITY PROTOCOLS AND THEIR APPLICATION IN MODERN NETWORKS

Virtual Private Networks (VPNs) play a crucial role in ensuring secure communication over public networks. This concept paper provides a comprehensive review of security protocols used in VPNs and their application in modern networks. The paper begins by defining VPNs and explaining their importance in securing data transmission over untrusted networks. It then discusses the evolution of VPN technology, highlighting the transition from traditional IPSec and SSL/TLS protocols to more modern approaches such as WireGuard and QUIC. The paper also examines the security protocols used in VPNs, including IPSec, SSL/TLS, and the newer protocols like WireGuard and QUIC. Each protocol is analyzed in terms of its security features, performance, and suitability for different use cases. Furthermore, the paper explores the application of VPNs in modern networks, including their use in remote access, site-to-site connectivity, and securing cloud-based services. It also discusses the challenges and considerations involved in deploying and managing VPNs in today's complex network environments. In conclusion, the paper emphasizes the importance of VPNs in ensuring secure communication in modern networks. It highlights the need for organizations to carefully evaluate their VPN requirements and choose the appropriate security protocols and technologies to protect their data and networks. Keywords: VPN, Security, Applications, Network.