JNCIP-ENT exam topics are based on the content of the recommended instructor-led training courses, as well as the additional resources.

• Exam code: JN0-648
• Written exam
• Administered by Pearson VUE
• Exam length: 120 minutes
• Exam type: 65 multiple-choice questions
• Pass/fail status is available immediately
• Software Release:
  • Junos Software: 19.3

OSPF

Describe the concepts, operation and functionality of OSPFv2 and OSPFv3

• OSPF LSA types
• OSPF area types and operations
• LSA flooding through an OSPF multi-area network
• DR/BDR operation
• SPF algorithm
• Metrics, including external metric types
• Authentication options
• Route summarization and restriction
• Overload
• Virtual links
• OSPFv2 vs OSPFv3
• Given a scenario, demonstrate knowledge of how to configure and monitor single-area and multi-area OSPF
• Implement OSPF routing policy

BGP

Describe the concepts, operation and functionality of BGP

• BGP route selection process
• Next hop resolution
• BGP attributes – concept and operation
• BGP communities
• Regular expressions
• Load balancing – multipath, multihop, forwarding table
• NLRI families – inet, inet6
• Advanced BGP options
• Given a scenario, demonstrate knowledge of how to configure and monitor BGP
• Implement BGP routing policy

IP Multicast

Describe the concepts, operation and functionality of IP multicast

• Components of IP multicast, including multicast addressing
• IP multicast traffic flow
• Any-Source Multicast (ASM) vs. Source-Specific Multicast (SSM)
• RPF – concept and operation
• IGMP, IGMP snooping
• PIM dense-mode and sparse-mode
• Rendezvous point (RP) – concept, operation, discovery, election
• SSM – requirements, benefits, address ranges
• Anycast RP
• MSDP
• Routing policy and scoping
• Given a scenario, demonstrate knowledge of how to configure and monitor IGMP, PIM-DM and PIM-SM (including SSM)
• Implement IP multicast routing policy

Ethernet Switching and Spanning Tree

Describe the concepts, operation and functionality of advanced Ethernet switching

• Filter-based VLANs
• Private VLANs
• Dynamic VLAN registration using MVRP
• Tunnel Layer 2 traffic through Ethernet networks
• Layer 2 tunneling using Q-in-Q and L2PT
• Given a scenario, demonstrate knowledge of how to configure and monitor advanced Ethernet switching
• Describe the concepts, operation and functionality of advanced spanning tree protocols, including MSTP and VSTP

Given a scenario, demonstrate knowledge of how to configure and monitor MSTP and VSTP

Layer 2 Authentication and Access Control

Describe the operation of various Layer 2 authentication and access control features

• Authentication process flow
• 802.1x – concepts and functionality
• MAC RADIUS
• Captive portal
• Server fail fallback
• Guest VLAN
• Considerations when using multiple authentication/access control methods

Given a scenario, demonstration how to configure and monitor Layer 2 authentication and access control

IP Telephony Features
Describe the concepts, operation and functionality of features that facilitate IP telephony deployments

• Power over Ethernet (PoE)
• LLDP and LLDP-MED
• Voice VLAN

Given a scenario, demonstration how to configure and monitor Layer 2 authentication and access control

Class of Service (CoS)
Describe the concepts, operation and functionality of Junos CoS for Layer 2/3 networks

• CoS processing on Junos devices
• CoS header fields
• Forwarding classes
• Classification
• Packet loss priority
• Policers
• Schedulers
• Drop profiles
• Shaping
• Rewrite rules

Given a scenario, demonstrate knowledge of how to configure and monitor CoS for Layer 2/3 networks

EVPN

Describe the concepts, operation, or functionality of Junos EVPN

• VXLAN
• Multi-homing (for example, active route types)

Given a scenario, demonstrate knowledge of how to configure, troubleshoot, or monitor EVPN