- 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
Various authentication protocols are listed and described below.
- CHAP - Challenge Handshake Authentication Protocol is a three way handshake protocol which is considered more secure than PAP. Authentication Protocol.
- EAP - Extensible Authentication Protocol is used between a dial-in client and server to determine what authentication protocol will be used.
- PAP - Password Authentification Protocol is a two way handshake protocol designed for use with PPP. Authentication Protocol Password Authentication Protocol is a plain text password used on older SLIP systems. It is not secure.
- SPAP - Shiva PAP. Only NT RAS server supports this for clients dialing in.
- DES - Data Encryption Standard for older clients and servers.
- RADIUS - Remote Authentication Dial-In User Service used to authenticate users dialing in remotely to servers in a organization's network.
- S/Key - A one time password system, secure against replays. RFC 2289. Authentication Protocol.
- TACACS - Offers authentication, accounting, and authorization. Authentication Protocol.
- MS-CHAP (MD4) - Uses a Microsoft version of RSA message digest 4 challenge and reply protocol. It only works on Microsoft systems and enables data encryption. Selecting this authentification method causes all data to be encrypted.
- SKID - SKID2 and SKID3 are vulnerable to a man in the middle attack.