JNCIS-ENT OSPF Practice Question
What is the primary function of the OSPF Designated Router (DR) on a broadcast network segment?
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
✓
To minimize the number of adjacencies and LSA flooding traffic on a multi-access segment
The DR reduces network traffic and LSA flooding overhead by acting as a central focal point for exchanging routing information and generating the Network LSA (Type 2) on multi-access segments.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
To translate Type 7 LSAs into Type 5 LSAs for the backbone
Why it's wrong here
Incorrect. This is the role of an NSSA ABR, not the DR.
- ✗
To authenticate OSPF hello packets across interfaces
Why it's wrong here
Incorrect. Authentication is handled by interface-level security keys, not the DR.
- ✗
To act as the sole exit gateway for all external traffic in the AS
Why it's wrong here
Incorrect. ASBRs handle external traffic entry; DRs handle multi-access local topology management.
- ✓
To minimize the number of adjacencies and LSA flooding traffic on a multi-access segment
Why this is correct
Correct. The DR and BDR limit adjacency bloat and reduce flooding traffic on broadcast/NBMA networks.
Visual reference
About these practice questions
This JNCIS-ENT question is part of Courseiva's 506-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam 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.