mediumMultiple ChoiceObjective-mapped
200-201 Practice Question: A security policy requires that all remote access…
A security policy requires that all remote access be authenticated using a one-time password (OTP) token. Which technology should be implemented?
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
✓
RADIUS with token server
RADIUS can integrate with an OTP token server to provide one-time password authentication. Option A is wrong because SSH key pairs are not OTP-based. Option C is wrong because LDAP with username and password does not support OTP. Option D is wrong because pre-shared keys are not OTP.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
SSH key pairs
Why it's wrong here
SSH keys are cryptographic keys, not one-time passwords.
- ✓
RADIUS with token server
Why this is correct
RADIUS can authenticate users against an OTP token server, meeting the requirement.
- ✗
LDAP with username and password
Why it's wrong here
LDAP provides password-based authentication, not OTP.
- ✗
VPN with pre-shared key
Why it's wrong here
Pre-shared keys are static, not one-time.
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.
Go deeper
Related to this question
About these practice questions
This 200-201 question is part of Courseiva's 979-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
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.