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200-901 Practice Question: A network administrator is configuring SNMPv3 on…
A network administrator is configuring SNMPv3 on a router for secure monitoring. Which combination of parameters is required to ensure authentication and encryption?
⚠ Common exam trap
Cisco often tests the distinction between authNoPriv and authPriv, where candidates mistakenly think authentication alone is sufficient for 'secure monitoring' and overlook the encryption requirement.
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
✓
SNMPv3 with authPriv
SNMPv3 with authPriv is the correct combination because it enables both authentication (via HMAC-MD5 or HMAC-SHA) and encryption (via DES or AES) to ensure secure monitoring. The authPriv security level provides message integrity, origin authentication, and data confidentiality, meeting the requirement for both authentication and encryption.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
SNMPv3 with authPriv
Why this is correct
Provides authentication and encryption.
- ✗
SNMPv3 with noAuthNoPriv
Why it's wrong here
No security level.
- ✗
SNMPv3 with authNoPriv
Why it's wrong here
Authentication only.
- ✗
SNMPv2c with a complex community string
Why it's wrong here
Community strings are sent in plaintext.
Quick reference
Symmetric Encryption Algorithm Comparison
| Algorithm | Key Size | Block Size | Status | Notes |
|---|---|---|---|---|
| AES-128 | 128-bit | 128-bit | Current standard | NIST approved; WPA3, TLS |
| AES-256 | 256-bit | 128-bit | Current standard | Preferred for sensitive / govt data |
| 3DES | 112-bit effective | 64-bit | Deprecated (2023) | Replaced by AES |
| DES | 56-bit | 64-bit | Broken | Cracked in < 24 h; never deploy |
| ChaCha20 | 256-bit | Stream cipher | Current | TLS 1.3, WireGuard |
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 200-901 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 200-901 exam.