Comparison should include the following:
- VPN
- Site-to-site/host-to-site/host-to-host
- Protocols
- Internet Protocol Security (IPSec)
- Generic Routing Encapsulation (GRE)
- SSL VPN
- Point-to-Point/Point-to-Point Tunneling Protocol (PTP/PPTP)
- Terminal Access Control Access Control System/Remote Authentication Dial-In User Service (TACACS/RADIUS)
- Remote Access Service (RAS)
- Web services
- Unified voice services
- Network controllers
Process/Skill Questions:
- What are the differences between IPSec and SSL VPN protocols?
- What is RAS?
- What is the difference between TACACS and RADIUS?