This 200-301 practice question tests your understanding of network services and security. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: authentication verifies the identity of a user or device attempting to access the network before any permissions are granted.. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
In AAA, which function determines what an authenticated user is allowed to do after login?
Authentication
Why wrong: Authentication answers who the user is.
Authorization
Correct. Authorization controls what the user may do.
Accounting
Why wrong: Accounting records session details and actions.
Encryption
Why wrong: Encryption is not one of the AAA terms being tested here.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Authorization
Authentication verifies identity. Authorization determines permitted actions. Accounting records activity.
Key principle: Authentication verifies the identity of a user or device attempting to access the network before any permissions are granted.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Authentication
Why it's wrong here
Authentication answers who the user is.
When this WOULD be correct
If the question asked about the process of verifying a user's identity before they can access resources, then 'Authentication' would be the correct answer. For example, a question could specify the steps taken to confirm user credentials during a login process.
Authorization
Why this is correct
Correct. Authorization controls what the user may do.
Related concept
Authentication verifies the identity of a user or device attempting to access the network before any permissions are granted.
Accounting
Why it's wrong here
Accounting records session details and actions.
When this WOULD be correct
If the question asked about the function that tracks user actions and resource consumption in a network, then 'Accounting' would be the correct answer. For example, a question might state, 'Which AAA function logs user activity for auditing purposes?'
Encryption
Why it's wrong here
Encryption is not one of the AAA terms being tested here.
When this WOULD be correct
If the question asked which function is responsible for securing data during transmission or storage, then encryption would be the correct answer. For example, a question could state, 'What method protects user credentials during transmission?'
Option-by-option analysis
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The 200-301 exam frequently reuses these exact scenarios with slightly different constraints.
Why this is correct
Correct. Authorization controls what the user may do.
Why this is wrong here
Authentication is the process of verifying a user's identity, not determining their permissions. In the context of this question, it does not address what actions an authenticated user is allowed to perform.
★ When this WOULD be the correct answer
If the question asked about the process of verifying a user's identity before they can access resources, then 'Authentication' would be the correct answer. For example, a question could specify the steps taken to confirm user credentials during a login process.
Why candidates choose this
Candidates may confuse authentication with authorization because both are critical components of security; they might mistakenly believe that verifying identity also includes defining user permissions.
Why this is wrong here
Accounting refers to the tracking and logging of user activities and resource usage, not the permissions or access rights granted to users after authentication. Therefore, it does not determine what an authenticated user is allowed to do.
★ When this WOULD be the correct answer
If the question asked about the function that tracks user actions and resource consumption in a network, then 'Accounting' would be the correct answer. For example, a question might state, 'Which AAA function logs user activity for auditing purposes?'
Why candidates choose this
Candidates may confuse accounting with authorization, as both relate to user management; however, they focus on different aspects of user access and activity. The term 'accounting' might seem relevant when considering user permissions and access control.
Why this is wrong here
Encryption is a process that secures data by converting it into a coded format, but it does not determine user permissions or access rights after authentication. Therefore, it is not relevant to the function of managing user privileges post-login.
★ When this WOULD be the correct answer
If the question asked which function is responsible for securing data during transmission or storage, then encryption would be the correct answer. For example, a question could state, 'What method protects user credentials during transmission?'
Why candidates choose this
Candidates may confuse encryption with authorization, thinking that securing data is part of user permissions, leading them to select encryption as a related concept despite it not addressing user access rights.
Analysis generated from the official 200-301blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Don't confuse authentication with authorization; they serve different purposes in AAA.
Detailed technical explanation
AAA stands for Authentication, Authorization, and Accounting, a fundamental security framework used in Cisco networking to control user access and track user activity. Authentication is the process that verifies the identity of a user or device attempting to access the network, ensuring they are who they claim to be. Authorization follows authentication and determines the specific resources and actions the authenticated user is permitted to access or perform. Accounting then records the details of user sessions and activities for auditing and compliance purposes. In the AAA process, once a user successfully authenticates, the authorization function evaluates the user's permissions based on predefined policies or roles. This step is critical because it enforces security by restricting user capabilities to only what is necessary or allowed, such as access to certain network devices, commands, or services. Cisco devices use protocols like RADIUS or TACACS+ to implement AAA, where the authorization component consults centralized servers to decide the allowed operations for each user. A common exam trap is confusing authentication with authorization, assuming that verifying identity also grants permissions. However, authentication only confirms who the user is, while authorization explicitly controls what the user can do after login. Practically, this separation allows network administrators to enforce granular access controls and audit user actions effectively. Understanding this distinction is essential for configuring secure Cisco networks and passing the CCNA exam.
Key takeaway
Authentication verifies the identity of a user or device attempting to access the network before any permissions are granted.
Real-world example
A security administrator must allow nursing staff to reach a patient records server while blocking access from the guest Wi-Fi VLAN. After applying an extended ACL, traffic is still blocked from nursing workstations. The ACL was applied outbound instead of inbound on the wrong interface. Questions like this test ACL direction and placement rules.
What to study next
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FAQ
Network Services and Security — This question tests Network Services and Security — Authentication verifies the identity of a user or device attempting to access the network before any permissions are granted..
The correct answer is: Authorization — Authentication verifies identity. Authorization determines permitted actions. Accounting records activity.
Review authentication verifies the identity of a user or device attempting to access the network before any permissions are granted., then practise related 200-301 questions on the same topic to reinforce the concept.
Authentication verifies the identity of a user or device attempting to access the network before any permissions are granted.
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Last reviewed: May 17, 2026
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