350-501 Security and Services Practice Question
An SP wants to secure management access to IOS XR routers. Which two measures should be implemented? (Choose two.)
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
✓
Implement AAA with TACACS+
SSH provides encrypted remote access, and AAA with TACACS+ provides centralized authentication and authorization. SNMPv3 is also secure but not a management access method per se; the question asks for access measures.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Implement AAA with TACACS+
Why this is correct
TACACS+ provides secure authentication and authorization.
- ✗
Enable Telnet for remote access
Why it's wrong here
Telnet is insecure; SSH should be used.
- ✗
Use SNMPv2c for monitoring
Why it's wrong here
SNMPv2c uses community strings in clear text.
- ✓
Use SSH for remote access
Why this is correct
SSH provides encrypted remote shell access.
- ✗
Disable all logging
Why it's wrong here
Logging is important for security monitoring.
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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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-501 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 350-501 exam.