1. VPNs Virtual Private Networks

2. VPNs: Purpose Emulate a private network using shared Service Provider infrastructure Same policies as private network What is between private premises is transparent to the SP’s customer

3. Types of VPNs Access VPN: Provides remote access to a corporate intranet or extranet over a shared infrastructure Intranet VPN: Links corporate headquarters, remote offices, and branch offices over a shared infrastructure Extranet VPN:Links customers, suppliers, partners, or communities of interest to a corporate intranet over a shared infrastructure

4. Logical topology

7. Connection Establishment