JNCIS-ENT Layer 2 Switching And VLANs Practice Question
An enterprise network design requires implementing private VLANs (PVLANs) on an EX Series switch. Which THREE components or port types are characteristic of a private VLAN architecture? (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
✓
Community ports that can communicate with other ports in the same community and promiscuous ports.
Private VLANs use primary VLANs, secondary isolated/community VLANs, and promiscuous ports for gateway connectivity.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Community ports that can communicate with other ports in the same community and promiscuous ports.
Why this is correct
Correct. Community VLAN ports can talk within their community and to promiscuous ports.
- ✓
Isolated ports that can only communicate with promiscuous ports.
Why this is correct
Correct. Isolated ports have restricted communication.
- ✓
Promiscuous ports that can communicate with all ports across both primary and secondary VLANs.
Why this is correct
Correct. Promiscuous ports communicate with all PVLAN ports.
- ✗
Routing instance interfaces (RIB-only) that automatically disable Layer 2 bridging.
Why it's wrong here
PVLANs are Layer 2 features and do not disable bridging.
- ✗
Fully meshed trunk ports that bypass all isolation rules for inter-VLAN routing.
Why it's wrong here
Trunk ports do not bypass PVLAN isolation rules.
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.