1.4 Relationship to Other Protocols
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Because NTLM is embedded in the application protocol, it
does not have transport dependencies of its own.
NTLM is used for authentication by several application
protocols, including server message block [MS-SMB]
(SMB), and [MS-NTHT]
(HTTP). For an example of how NTLM is used in SMB, see section 4.
Other protocols invoke NTLM as a function library. The
interface to that library is specified in GSS-API [RFC2743]. The
NTLM implementation of GSS-API calls is specified in section 3.4.6.<4>