JNCIS-ENT Tunnels Practice Question
Which TWO parameters are mandatory when configuring a basic GRE tunnel interface in Junos? (Choose two)
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
✓
Tunnel destination IP address
Configuring a GRE tunnel requires defining both the tunnel source IP address and the tunnel destination IP address.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
GRE keepalive interval timer
Why it's wrong here
Keepalives are optional for GRE tunnels.
- ✓
Tunnel destination IP address
Why this is correct
The destination IP address is mandatory to identify the remote tunnel endpoint.
- ✓
Tunnel source IP address
Why this is correct
The source IP address is mandatory to identify the local tunnel endpoint.
- ✗
Routing protocol authentication key
Why it's wrong here
Authentication keys are optional for routing protocols running over tunnels.
- ✗
IPsec security association profile
Why it's wrong here
IPsec is optional and not mandatory for a basic unencrypted GRE tunnel.
About these practice questions
Courseiva writes every JNCIS-ENT question from scratch — 506 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. 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.