authentication – I need some help understanding AAA

So I’m studying for my Net+ and I just need some help putting the pieces together.

So for the AAA framework, we have RADIUS and TACACS+. Which are used for user authentication for NAC and device administration, respectively. From there they can use various authentication protocols which are based on the 802.1x standard, such as EAP, LEAP, EAP-TLS and EAP FAST. Then there are the encryption methods such as PSK, AES and RC4-TKIP.

Is my understanding of everything correct?

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