Information » While TACACS+ encrypts the

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n Exam Tutorial: Knowing RADIUS and TACACS+ For Your ISCW Exam Computers Articles | May 4, 2008

As part of your CCNP certification exam studies, particularly for the ISCW exam, you need to be very clear on the differences between TACACS+ and RADIUS.?? Learn all about these differences in this exclusive article!



As part of your CCNP certification exam studies, particularly for the ISCW exam, you need to be very clear on the differences between TACACS+ and RADIUS.


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As a CCNA and future CCNP, you've already configured authentication in the form of creating a local database of usernames and passwords for both Telnet access and PPP authentication.? This is sometimes called a self-contained AAA deployment, since no external server is involved.


It's more than likely that you'll be using a server configured for one of the following security protocols:


TACACS+ Ozzie Smith Jersey , a Cisco-proprietary, TCP-based protocol


RADIUS, an open-standard, UDP-based protocol originally developed by the IETF


An obvious question is "If there's a TACACS+, what about TACACS?"? TACACS was the original version of this protocol and is rarely used today.


Before performing AAA Authentication configuration, there are some other TACACS+ RADIUS differences you should be aware of:


While TACACS+ encrypts the entire packet, RADIUS encrypts only the password in the initial client-server packet.


RADIUS actually combines the a