In the previous chapter, we discussed data protection and security techniques by looking at firewalls and firewall network design, as well as its placement. In this chapter, we will focus on protecting data before transmitting it over a public internet infrastructure or a network infrastructure shared by a service provider.
We are going to cover the following topics in this chapter:
- Overview
- Classes of VPN
- Type of VPN protocol
- VPN design
- IKE V1 versus IKE V2
- WAN encryption technique
