JNCIA-SEC Srx Series Service Gateways Practice Question
You are troubleshooting an IPsec VPN tunnel between two SRX Series gateways. Phase 2 negotiations are failing. Which operational command should you use to check Phase 2 IPsec security association statuses and traffic counters?
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
✓
show security ipsec security-associations
The command 'show security ipsec security-associations' displays active Phase 2 IPsec SAs.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
show security ike security-associations
Why it's wrong here
This shows Phase 1 IKE SAs, not Phase 2 IPsec SAs.
- ✗
show vpn tunnels active
Why it's wrong here
This is not valid Junos syntax.
- ✓
show security ipsec security-associations
Why this is correct
This command displays active Phase 2 IPsec security associations, SPIs, and encrypted/decrypted byte counters.
- ✗
show crypto ipsec sa
Why it's wrong here
This syntax belongs to other vendors.
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
Courseiva writes every JNCIA-SEC question from scratch — 513 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-SEC 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-SEC exam.