JNCIA-DevOps Junos Automation Stack And DevOps Concepts Practice Question
Which THREE mechanisms are valid methods for authenticating and establishing a NETCONF session with 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
✓
Remote RADIUS or TACACS+ AAA server integration via SSH transport
NETCONF on Junos runs over SSH, supporting SSH keys, username/password, and AAA integration.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Remote RADIUS or TACACS+ AAA server integration via SSH transport
Why this is correct
Correct. Junos supports AAA for NETCONF/SSH sessions.
- ✓
Username and password authentication over SSH
Why this is correct
Correct. Standard credentials work over SSH.
- ✓
SSH public key authentication
Why this is correct
Correct. SSH keys are widely used for secure automation.
- ✗
Anonymous guest access without credentials
Why it's wrong here
Guest access is insecure and unsupported for NETCONF.
- ✗
Unencrypted cleartext Telnet on TCP port 23
Why it's wrong here
NETCONF does not run over Telnet.
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.