JNCIS-ENT High Availability Practice Question
Which THREE criteria are evaluated by Junos when electing the primary Routing Engine in an EX Series Virtual Chassis? (Choose three)
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
✓
Switch uptime or boot order sequence if priorities are identical.
Virtual Chassis master election evaluates pre-configured priority, uptime/boot order, and lowest MAC address as tie-breakers.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Switch uptime or boot order sequence if priorities are identical.
Why this is correct
Boottime/uptime acts as a tie-breaker when priorities match.
- ✗
The VRRP router ID configured on VLAN 1.
Why it's wrong here
VRRP settings have no impact on Virtual Chassis mastership.
- ✓
Base MAC address of the switch as a deterministic tie-breaker.
Why this is correct
Lower MAC address is the final deterministic tie-breaker if priority and uptime match.
- ✓
Configured routing-engine mastership priority values.
Why this is correct
Priority is the primary user-configurable factor in master election.
- ✗
The number of active LACP links connected to member 0.
Why it's wrong here
LAG configuration does not participate in Virtual Chassis RE elections.
Quick reference
Access Control Model Comparison
| Model | Acronym | Who Controls Access? | Best For |
|---|---|---|---|
| Discretionary Access Control | DAC | Resource owner | Small teams, file shares |
| Mandatory Access Control | MAC | System / security labels | Classified govt / military |
| Role-Based Access Control | RBAC | Administrator (via roles) | Enterprise environments |
| Attribute-Based Access Control | ABAC | Policy engine (user + resource attributes) | Fine-grained, dynamic policies |
| Rule-Based Access Control | RuBAC | System rules / ACLs | Firewall rules, network ACLs |
About these practice questions
One of 506 original JNCIS-ENT practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Juniper Networks exam blueprint
This JNCIS-ENT practice question is part of Courseiva's free Juniper Networks 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 JNCIS-ENT exam.