JNCIS-ENT Protocol Independent Routing Practice Question
You need to create a virtual router routing instance to isolate traffic for a specific department. Which routing-instance type should you configure in the Junos configuration?
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
✓
virtual-router
The 'virtual-router' instance type is used for complete routing isolation where the instance runs its own independent routing protocols and tables, similar to a VRF but without VPN-specific MPLS labels.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
forwarding
Why it's wrong here
A forwarding instance is used strictly for filter-based forwarding and does not run independent routing protocols.
- ✓
virtual-router
Why this is correct
The virtual-router instance type provides full standalone routing capabilities and separate routing tables.
- ✗
no-structural-instance
Why it's wrong here
This is not a valid Junos routing instance type.
- ✗
l2vpn
Why it's wrong here
An L2VPN instance is used for Layer 2 Virtual Private Networks.
Quick reference
VPN Protocol Comparison
| Protocol | Port | Encryption | Authentication | Use Case |
|---|---|---|---|---|
| IKEv2 / IPsec | UDP 500 / 4500 | AES-256 | Certificates / PSK | Site-to-site & remote access |
| SSL / TLS VPN | TCP 443 | TLS 1.3 | Certificates / MFA | Clientless remote access |
| L2TP / IPsec | UDP 1701 | AES (IPsec) | PSK / Certificates | Legacy remote access |
| WireGuard | UDP 51820 | ChaCha20 | Public keys | Modern high-performance VPN |
| PPTP | TCP 1723 | MPPE (weak) | MS-CHAPv2 | Legacy — avoid in production |
PPTP is considered insecure. IKEv2/IPsec and SSL VPN are the current recommended options.
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.