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There are more remote authentication protocols supported by Win2K if you're studying them; PAP, CHAP, SPAP, MS-CHAP(v1 and v2), EAP, EAP-TLS(digitial certs/smartcards) and RADIUS. &nbsp;
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There are more remote authentication protocols supported by Win2K if you're studying them; PAP, CHAP, SPAP, MS-CHAP(v1 and v2), EAP, EAP-TLS(digitial certs/smartcards) and RADIUS.  

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Ok im sure i sound confused<br />
<br />
As i understand Windows 2000 has 2 authentication protocols, Kerberos which it uses for other W2K clients and NTLM which it uses with downlevel clients in mixed mode.<br />
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Now what are MS-CHAP and CHAP used for exacly? Are they just remote access authentication protocols?
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Ok im sure i sound confused

As i understand Windows 2000 has 2 authentication protocols, Kerberos which it uses for other W2K clients and NTLM which it uses with downlevel clients in mixed mode.

Now what are MS-CHAP and CHAP used for exacly? Are they just remote access authentication protocols?

W2K authentication methods

Windows 2000 is an operating system for use on both client and server computers. It is the successor to Windows NT 4.0, and is the last version of Microsoft Windows to display the "Windows NT" designation. Four editions of Windows 2000 were released (Professional, Server, Advanced Server, and Datacenter Server) that shared a core set of features, including many system utilities such as the Microsoft Management Console. All versions of the operating system support NTFS 3.0, Encrypting File System, as well as basic and dynamic disk storage. The Windows 2000 Server family includes support for Active Directory services, Distributed File System and fault-redundant storage volumes.