- A
vPC peer-link
Why wrong: Peer-link carries data and control traffic, not consistency checks.
- B
vPC consistency check
Consistency checks ensure parameter matching between peers.
- C
vPC peer-keepalive
Why wrong: Keepalive is for liveness detection, not configuration consistency.
- D
vPC auto-recovery
Why wrong: Auto-recovery restores vPC after peer failure, not consistency.
Question 244 of 1,000
350-601 Network Practice Question
This 350-601 practice question tests your understanding of network. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
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?
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.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
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.
Common exam traps
Common exam trap: answer the scenario, not the keyword
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.
Detailed technical explanation
How to think about this question
Under the hood, NX-OS performs Type-1 consistency checks (e.g., VLAN allowed list, STP mode, MTU) and Type-2 checks (e.g., QoS policies, port-channel hashing) by exchanging configuration hashes over the vPC peer-link. If a mismatch is detected, the vPC member port is placed in a suspended state (operationally down) to avoid packet drops. In real-world scenarios, a mismatch in the allowed VLAN list on one peer can cause traffic to be forwarded out a non-vPC port, leading to black-holing.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A help-desk technician troubleshoots why a newly connected PC cannot reach shared printers on the same floor. The cable is good, the switch port is active, but the PC is in VLAN 20 and the printers are in VLAN 10. The uplink trunk only allows VLAN 10. A trunk being up does not mean every VLAN crosses it.
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 |
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Network — study guide chapter
Learn the concepts, then practise the questions
- →
Network practice questions
Targeted practice on this topic area only
- →
All 350-601 questions
1,000 questions across all exam domains
- →
Cisco DCCOR / CCNP Data Center Core 350-601 study guide
Full concept coverage aligned to exam objectives
- →
350-601 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related 350-601 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Security practice questions
Practise 350-601 questions linked to Security.
Network practice questions
Practise 350-601 questions linked to Network.
Storage Network practice questions
Practise 350-601 questions linked to Storage Network.
Automation practice questions
Practise 350-601 questions linked to Automation.
Compute practice questions
Practise 350-601 questions linked to Compute.
350-601 fundamentals practice questions
Practise 350-601 questions linked to 350-601 fundamentals.
350-601 scenario practice questions
Practise 350-601 questions linked to 350-601 scenario.
350-601 troubleshooting practice questions
Practise 350-601 questions linked to 350-601 troubleshooting.
Practice this exam
Start a free 350-601 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this 350-601 question test?
Network — This question tests Network — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: 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.
What should I do if I get this 350-601 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Keep practising
More 350-601 practice questions
- In Cisco ACI, which component is responsible for translating EPG communication policies into concrete configuration on l…
- An engineer is configuring OSPF on a Cisco Nexus switch in a data center. The network consists of multiple point-to-poin…
- An engineer is configuring BGP EVPN for VXLAN in a spine-leaf fabric. The leaf switches must advertise host IP-to-MAC ma…
- Which VLAN range is reserved by default on Cisco Nexus switches?
- In VXLAN overlay networks, which mechanism is used to forward broadcast, unknown unicast, and multicast (BUM) traffic wh…
- Which command is used to verify the OSPF neighbor state in NX-OS?
Last reviewed: Jul 4, 2026
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.