About this interactive
AAA stands for authentication, authorization and accounting, and the AAA lesson gives each a plain job.
Authentication: proving who you are. A password, a fingerprint, a smart card with its PIN or the answers to agreed questions all prove an identity.
Authorization: deciding what you may reach once you are known. Which rooms a key card opens, which files you can change and which you can only read, how big a refund you may approve.
Accounting: tracking what happens. The lesson's examples are server logs, data access logs, change logs, document versioning that keeps who changed what, and browser history.
The lesson also notes that AAA and IAM overlap so much that people often use the terms for each other; in IAM, accounting is built into access management. TACACS+, RADIUS and Diameter are the protocols that carry AAA between network devices and their servers.
A quick test for each card: is the system checking who someone is, deciding what they may do, or writing down what was done?
About TechKnowSurge
TechKnowSurge builds IT and cybersecurity professionals through hands-on, concept-first training built around real understanding — not memorization. Free interactive tools, structured programs, and 25+ years of real-world experience, all in one place.
Explore free tools and programs →