- Network Models
- Network Layers
- TCP/IP Protocols
- Microsoft Protocols
- IPX/SPX Protocols
- AppleTalk Protocols
- SNA Protocols
- Other Protocols
- Authentication Protocols
- Encryption Protocols
- Tunneling Protocols
- Terms and Definitions
- IPIP tunneling - Tunneling IP packets in IP packets.
- IPSec - Internet protocol security, developed by IETF, implemented at layer 3. it is a collection of security measures that address data privacy, integrity, authentication, and key management, in addition to tunneling. Does not cover key management. A VPN tunneling Protocol.
- L2F - Layer2 Forwarding, works at the link layer of the OSI model. It has no encryption. It is being replaced by L2TP. A VPN tunneling Protocol.
- L2TP - Layer2 Tunneling Protocol. (RFC 2661) Combines features of L2F and PPTP and works at the link layer. No encryption or key management is included in specifications. A VPN tunneling Protocol. It uses IPSec for encryption.
- PPTP - Point-to-Point Tunneling Protocol (RFC 2637) works at the link layer. No encryption or key management included in specifications. A VPN tunneling Protocol used to send secure communications from point to point.
- Socks - handled at the application layer.