Comparison of RADIUS and TACACS+
Hi guys quick comparison between TACACS and RADIUS is as under
| RADIUS | TACACS+ |
| Developer | Originally developed by Livingston (now industry standard) | Cisco proprietary |
| Transport Protocol | UDP port 1645/1646 and as per RFC 2138; 1812/1813
| TCP port 49 |
| AAA Support | Combines the authentication and authorization packet and separates the accounting packets
| Uses the AAA architecture and separates the three services of AAA |
| Challenge Response | Unidirectional—Single challenge response | Bidirectional—Multiple challenge responses
|
| Protocol Support | No NetBEUI | Full support |
| Security | Encrypts only the password in the packet | Encrypts entire packet
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