Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) : JN0-348 exam

JN0-348 real exams

Exam Code: JN0-348

Exam Name: Enterprise Routing and Switching, Specialist (JNCIS-ENT)

Updated: Jul 23, 2026

Q & A: 95 Questions and Answers

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About Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) - JN0-348 Exam

Test Objectives: What Does It Cover?

In summary, JN0-348 exam is meant to give painstaking coverage of the certification concepts by following the recommended curriculum. And to achieve this, it focuses on the following concepts:

  • OSPF;
  • Layer 2 Switching or VLANs.
  • Spanning Tree;
  • High Availability;
  • BGP;
  • Tunnels;
  • IS-IS;
  • Protocol Independent Routing;
  • Layer 2 Security;

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What to Know about Exam

The Juniper JN0-348, like many Juniper tests, lasts 90 minutes with a maximum of 65 multiple-choice items. It is an exam that’s offered through the Pearson VUE website and candidates are usually graded based on pass/fail status. Juniper recommends that the willing exam-takers must be well-conversant with the Junos Space Network Director 3.1 and Junos 18.4 before registering for this test.

Reference: https://www.juniper.net/us/en/training/certification/certification-tracks/ent-routing-switching-track/?tab=jncis-enterprise

Juniper JN0-348 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: High Availability5% - 10%- Redundancy Technologies
  • 1. VRRP
  • 2. Virtual Chassis
  • 3. Link aggregation groups
Topic 2: Tunneling and Network Services5% - 10%- Tunneling Technologies
  • 1. Traffic forwarding concepts
  • 2. GRE tunnels
Topic 3: Routing Fundamentals15% - 20%- IP Routing Concepts
  • 1. Load balancing
  • 2. Static routing
  • 3. Routing tables and route preference
Topic 4: Layer 2 Switching and VLANs15% - 20%- VLAN Technologies
  • 1. VLAN configuration and verification
  • 2. Trunk and access ports
  • 3. 802.1Q tagging
- Ethernet Switching Fundamentals
  • 1. MAC learning and forwarding
  • 2. Switching and bridging concepts
  • 3. Frame processing
Topic 5: OSPF15% - 20%- OSPF Operation
  • 1. LSA types
  • 2. Route summarization
  • 3. Neighbor establishment
  • 4. Area concepts
Topic 6: BGP15% - 20%- BGP Routing
  • 1. BGP peering
  • 2. Routing policies
  • 3. Path selection process
  • 4. BGP attributes
Topic 7: Layer 2 Security and Loop Prevention10% - 15%- Security Features
  • 1. Port security concepts
  • 2. Layer 2 access control mechanisms
- Spanning Tree Technologies
  • 1. Loop and root protection
  • 2. STP and RSTP operation
  • 3. BPDU protection
Topic 8: IS-IS10% - 15%- IS-IS Fundamentals
  • 1. Route propagation
  • 2. Adjacency formation
  • 3. Level 1 and Level 2 routing

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