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Updated: Aug 29, 2026

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Juniper JN0-348 (Enterprise Routing and Switching, Specialist (JNCIS-ENT)) Certification Exam is designed to validate the skills and knowledge of networking professionals regarding enterprise routing and switching. It is specifically aimed at individuals who have practical experience in Junos OS, Juniper Networks routers, and switches. Enterprise Routing and Switching, Specialist (JNCIS-ENT) certification exam is a great way for network engineers to establish themselves as experts in their field and secure better job opportunities.

Juniper JN0-348 certification exam is an excellent way for IT professionals to demonstrate their expertise in enterprise routing and switching using Juniper Networks technologies. Whether you are looking to advance your career or help your organization better manage its network infrastructure, earning this certification can be a valuable asset.

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

The JN0-348 exam consists of 65 multiple-choice questions and has a time limit of 90 minutes. To pass the exam, candidates must achieve a score of at least 65%. Upon successfully passing the exam, candidates will receive the JNCIS-ENT certification, which is valid for three years. Recertification can be achieved by retaking the exam or by earning a higher-level Juniper certification.

Juniper JN0-348 Exam Overview:

Certification Vendor:Juniper Networks
Exam Name:Enterprise Routing and Switching, Specialist (JNCIS-ENT)
Exam Number:JN0-348
Exam Format:Multiple Response, Multiple Choice
Exam Price:USD 300
Exam Duration:90 minutes
Available Languages:English
Related Certifications:Juniper Networks Certified Associate - Junos (JNCIA-Junos)
Juniper Networks Certified Internet Specialist - Enterprise Routing and Switching (JNCIS-ENT)
Passing Score:60%
Real Exam Qty:65
Certificate Validity Period:3 years
Sample Questions:Juniper JN0-348 Sample Questions
Exam Way:Pearson VUE testing center or Juniper-authorized online proctored exam.
Pre Condition:JNCIA-Junos certification is recommended before attempting the JNCIS-ENT exam.
Official Syllabus URL:https://www.juniper.net/us/en/training/certification/tracks/enterprise-routing-switching.html

Juniper JN0-348 Exam Syllabus Topics:

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

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