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OAuth 2.0
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Application Layer — Authentication
Protocol Overview
Full Name
OAuth 2.0
Abbreviation
OAuth 2.0
OSI Layer
Application Layer
Category
Authentication
Default Port
443
RFC
RFC 6749
About OAuth 2.0
Authorization framework enabling third-party applications to obtain limited access to user accounts without exposing credentials. Foundation for modern API authorization and social login.
Application Layer
Authentication
Port 443
Standards Reference
OAuth 2.0 is defined in RFC 6749, published by the Internet Engineering Task Force (IETF). RFCs are the official standards documents for internet protocols and are freely available for public review.