350-601 Network Practice Question
Which NX-OS feature ensures that vPC member ports on both peers are configured identically to prevent inconsistencies that could lead to traffic black-holing?
⚠ Common exam trap
Cisco often tests the distinction between the vPC peer-link (data/control plane) and the vPC peer-keepalive (heartbeat), leading candidates to mistakenly associate the keepalive with configuration synchronization.
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
✓
vPC consistency check
The vPC consistency check ensures that critical parameters (e.g., VLAN configuration, STP settings, interface properties) are identical on both vPC peer switches. If a mismatch is detected, the vPC member port is suspended to prevent traffic black-holing caused by asymmetric forwarding. This mechanism is enforced by the Cisco NX-OS vPC Type-1 and Type-2 consistency checks.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
vPC peer-link
Why it's wrong here
Peer-link carries data and control traffic, not consistency checks.
- ✓
vPC consistency check
Why this is correct
Consistency checks ensure parameter matching between peers.
- ✗
vPC peer-keepalive
Why it's wrong here
Keepalive is for liveness detection, not configuration consistency.
- ✗
vPC auto-recovery
Why it's wrong here
Auto-recovery restores vPC after peer failure, not consistency.
Visual reference
Quick reference
Asymmetric Encryption Algorithm Comparison
| Algorithm | Key Exchange | Signatures | Equivalent Security Key | Notes |
|---|---|---|---|---|
| RSA-3072 | Yes | Yes | 128-bit | Widely deployed; slow for bulk data |
| ECDSA P-256 | No | Yes | 128-bit | Fast signatures; standard TLS certs |
| ECDH / ECDHE | Yes | No | 128-bit | Perfect forward secrecy in TLS 1.3 |
| DH / DHE | Yes | No | 128-bit (3072-bit key) | Replaced by ECDHE in modern TLS |
| Ed25519 | No | Yes | ~128-bit | SSH keys, modern PKI |
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-601 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 350-601 exam.