Notes

Outline

Chapter 10 Virtual Private Networks

VPN Defined A segment of the public network made to appear  part of a private network so that it can be used to carry private traffic securely Constructed by connecting two or more private networks using a tunnel

Types of VPNs May be encrypted (IPsec) or nonencrypted (GRE) May be formed using Frame Relay or ATM Network layer VPNs include IPsec, GRE, and L2TP Application layer VPNs include SSL and SSH Intranet VPNs connect two or more private networks within the same organization Extranet VPNs connect private networks belonging to more than one organization

Types of VPNs based on OSI Model Layers

Intranet and Extranet VPNs