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Exam Information
Official specifications published by Juniper
Exam Format
90 min
65
Not publicly disclosed
Professional
Registration
$300 USD
Pearson VUE or online proctoring
Validity
3 years
Pass current JNCIP-ENT exam; Earn continuing education credits; Pass higher level certification (JNCIE-ENT)
JN0-643 Exam Topics and Domains
JN0-643 is organized into 8 weighted domains. Expect to work with BGP, 802.1X, MAC RADIUS, 802.1p, and more.
1
Interior Gateway Protocols (IGPs)
IGP Concepts and Operations
IS-IS ProtocolOSPFv2 and OSPFv3IGP Routing Policy
- Describe the concepts, operation, or functionality of IGPs
- Demonstrate knowledge of how to configure, troubleshoot, or monitor IGPs
- Implement routing policies for IGPs
2
Border Gateway Protocol (BGP)
BGP Fundamentals
BGP Route Selection ProcessNext-Hop ResolutionBGP AttributesBGP CommunitiesBGP Load BalancingNLRI FamiliesAdvanced BGP Options
- Describe the concepts, operation, or functionality of BGP
- Demonstrate knowledge of how to configure, troubleshoot, or monitor BGP
- Implement BGP routing policy
3
IP Multicast
IP Multicast Fundamentals
Multicast Addressing and ComponentsASM vs SSMReverse Path Forwarding (RPF)IGMP and IGMP SnoopingPIM Sparse ModeRendezvous Point (RP)Anycast RPMSDPMulticast Routing Policy and Scoping
- Describe the concepts, operation, or functionality of IP multicast
- Demonstrate knowledge of how to configure, troubleshoot, or monitor IP multicast
- Implement IP multicast routing policy
4
Ethernet Switching and Spanning Tree
Advanced Ethernet Switching
Filter-Based VLANsPrivate VLANsDynamic VLAN Registration (MVRP)Layer 2 Tunneling
- Describe the concepts, operation, or functionality of advanced Ethernet switching
- Demonstrate knowledge of how to configure, troubleshoot, or monitor advanced Ethernet switching
Advanced Spanning Tree Protocols
MSTP (Multiple Spanning Tree Protocol)VSTP (VLAN Spanning Tree Protocol)
- Describe the concepts, operation, or functionality of advanced spanning tree protocols
- Demonstrate knowledge of how to configure, troubleshoot, or monitor MSTP or VSTP
5
Layer 2 Authentication and Access Control
L2 Authentication Methods
Authentication Process Flow802.1XMAC RADIUSCaptive PortalServer Fail FallbackGuest VLANMultiple Authentication Methods
- Describe the operation of various Layer 2 authentication or access control features
- Demonstrate how to configure, troubleshoot, or monitor Layer 2 authentication or access control
6
IP Telephony Features
IP Telephony Support Features
Power over Ethernet (PoE)LLDP and LLDP-MEDVoice VLAN
- Describe the concepts, operation, or functionality of features that facilitate IP telephony deployments
- Demonstrate how to configure, troubleshoot, or monitor features used to support IP telephony deployments
7
Class of Service (CoS)
Junos CoS for Layer 2/3 Networks
CoS ProcessingCoS Header FieldsForwarding ClassesClassificationPacket Loss Priority (PLP)PolicersSchedulersDrop ProfilesShapingRewrite Rules
- Describe the concepts, operation, or functionality of Junos CoS for Layer 2/3 networks
- Demonstrate knowledge of how to configure, troubleshoot, or monitor CoS for Layer 2 or 3 networks
8
EVPN (Ethernet VPN)
Junos EVPN
EVPN Route TypesVXLANEVPN Multi-homing
- Describe the concepts, operation, or functionality of Junos EVPN
- Demonstrate knowledge of how to configure, troubleshoot, or monitor EVPN
How do I earn this certification?
Passing JN0-643 earns the JNCIP-ENT certification. It sits in the Enterprise Routing and Switching track.
Current Level Exams
- JN0-649 - JNCIP-ENT (Current)
- JN0-650 - JNCIP-ENT (Future) Replaces JN0-649 on November 10, 2025
Next Level Options
JNCIE-ENT Lab - JNCIE-ENT Lab Exam 8-hour hands-on lab exam
Alternative Paths
- JN0-664 - JNCIP-SPComplementary service provider skills, overlapping IGP and BGP knowledge
- JN0-637 - JNCIP-SECSecurity professional skills for network architects
- JN0-480 - JNCIS-DC Data center networking skills, EVPN-VXLAN focus
Practice with Precision
The PlanetCert Simulator mirrors the real exam environment with authentic questions and timed pressure.
How to study for this exam?
The most effective way to prepare for JN0-643 is by using the PlanetCert Simulator to practice questions and review detailed explanations.
What's changed on this exam?
Current Status
- RETIRED
- Last content update: Unknown
- Announcement date: 2024
Updates
- Junos OS 24.4 JN0-650 (launching November 10, 2025) will be based on Junos OS 24.4, up from 21.2 in JN0-649 • Release date: 2024
- EVPN-VXLAN Ongoing EVPN remains a key domain in JNCIP-ENT exams with growing importance • Release date: Continuous updates
- Class of Service (CoS) Enhanced features CoS remains critical for QoS implementation in enterprise networks • Release date: Ongoing
Who should take this exam?
JNCIS-ENT
- Experience with Juniper Networks Junos OS
- Knowledge of advanced routing technologies
- Experience with enterprise routing and switching platforms