2023-12-01 14:46:51 -05:00
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# RADIUS, TACACS+, and Diameter
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The following is a comparison table for the RADIUS, TACACS+, and Diameter protocols.
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| Feature | RADIUS | TACACS+ | Diameter |
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|---------------------|------------------------------------|------------------------------------|-----------------------------------|
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| Transport Protocol | UDP | TCP | TCP or SCTP |
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| Encryption | Only password encryption | Full packet encryption | Full packet encryption |
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| AAA Support | Combined AAA (Authentication, Authorization, Accounting) | Separate AAA (Authentication, Authorization, and Accounting are distinct) | Combined AAA |
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| Usage | Network access, VPN authentication, etc. | Device administration | Mobile IP, SIP, NASREQ |
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| Standardization | RFC 2865 & RFC 2866 | Cisco proprietary | RFC 6733 |
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