JNCIA-DevOps Junos REST API Practice Question
Which THREE features are provided by the Junos REST API daemon (jpagent) when running on a Junos device? (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
✓
Translation between REST requests/JSON/XML payloads and Junos configuration/operational structures.
The jpagent daemon provides HTTP/HTTPS server capabilities, authentication handling against local/AAA databases, and translation between HTTP requests/JSON/XML and Junos internal RPC/configuration structures.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Kernel-level packet forwarding optimization for ASIC line cards.
Why it's wrong here
ASIC packet forwarding is handled by Junos packet forwarding engines (PFE), not jpagent.
- ✓
Translation between REST requests/JSON/XML payloads and Junos configuration/operational structures.
Why this is correct
jpagent translates web API payloads into Junos internal data formats.
- ✓
HTTP and HTTPS server listener management on configurable ports.
Why this is correct
jpagent manages HTTP and HTTPS server listeners.
- ✓
Authentication validation against local user databases or AAA.
Why this is correct
jpagent validates incoming HTTP Basic Auth credentials against Junos user databases.
- ✗
Autonomous BGP route reflection across core routing instances.
Why it's wrong here
BGP routing is handled by rpd, not jpagent.
Quick reference
AAA Protocol Comparison
| Protocol | Port(s) | Encryption | Transport | Primary Use |
|---|---|---|---|---|
| RADIUS | 1812 / 1813 | Password only | UDP | Network access control |
| TACACS+ | 49 | Full packet | TCP | Device administration |
| Diameter | 3868 | Full session | TCP / SCTP | Carrier / mobile networks |
| 802.1X | — | EAP-based | Layer 2 | Port-based access control |
TACACS+ encrypts the entire packet; RADIUS only encrypts the password field — a key exam distinction.
About these practice questions
Courseiva writes every JNCIA-DevOps question from scratch — 307 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 JNCIA-DevOps 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 JNCIA-DevOps exam.