hardMultiple ChoiceObjective-mapped
200-201 Practice Question: Refer to the exhibit
Exhibit
Refer to the exhibit. ! Output from show running-config | include aaa ! on a Cisco router aaa new-model aaa authentication login default local aaa authentication login CONSOLE none aaa authorization exec default local aaa accounting exec default start-stop group tacacs+ ! ! Output from show running-config | include tacacs ! on the same router tacacs server TACACS1 address ipv4 192.168.1.100 key cisco123 !
Refer to the exhibit. A network administrator notices that remote SSH logins to the router succeed, but the router is not sending accounting records. Based on the configuration, what is the most likely cause?
⚠ Common exam trap
Cisco often tests the distinction between authentication, authorization, and accounting (AAA) components, and the trap here is that candidates assume a working authentication implies accounting is also functional, overlooking that accounting requires a correctly defined and referenced server group.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The accounting command references a TACACS+ group that is not defined.
The `accounting exec default` command references a TACACS+ server group named 'tacacs_server_group' that is not defined in the configuration. Without a defined server group, the router cannot send accounting records to any TACACS+ server, even though SSH authentication succeeds via the local database.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The AAA authorization method is set to local, not TACACS+.
Why it's wrong here
Authorization method is independent of accounting.
- ✗
The TACACS+ server key is not configured correctly.
Why it's wrong here
The key 'cisco123' is configured under the server.
- ✗
The AAA authentication method uses local database instead of TACACS+.
Why it's wrong here
Authentication method does not affect accounting.
- ✓
The accounting command references a TACACS+ group that is not defined.
Why this is correct
The group 'tacacs+' is not defined; only a server is configured.
Quick reference
AAA Protocol Comparison
| Protocol | Port(s) | Encryption | Transport | Primary Use |
|---|---|---|---|---|
| RADIUS | 1812 / 1813 | Password only | UDP | Network access control |
| TACACS+ | 49 | Full packet | TCP | Device administration |
| Diameter | 3868 | Full session | TCP / SCTP | Carrier / mobile networks |
| 802.1X | — | EAP-based | Layer 2 | Port-based access control |
TACACS+ encrypts the entire packet; RADIUS only encrypts the password field — a key exam distinction.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 200-201 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 200-201 exam.