Exam Vouchers: Juniper Enterprise Routing and Switching Specialist (JN0-351)

The Juniper Enterprise and Routing Specialist Exam demonstrates competence with networking technology in general and Juniper Networks enterprise routing and switching platforms. JNCIS-ENT, the specialist-level certification in this track, is designed for experienced networking professionals with beginner to intermediate knowledge of routing and switching implementations in Junos. The written exam verifies your basic understanding of routing and switching technologies and related platform configuration and troubleshooting skills.

This track includes four certifications:

- JNCIA-Junos: Junos, Associate. For details, see  JNCIA-Junos.

- JNCIS-ENT: Enterprise Routing and Switching, Specialist. For details, see the sections below.

- JNCIP-ENT: Enterprise Routing and Switching, Professional. For details, see JNCIP-ENT.

- JNCIE-ENT: Enterprise Routing and Switching, Expert. For details, see JNCIE-ENT.

Exam Length: 90 minutes

Exam Type: 65 multiple-choice questions

Software Versions: Junos 23.1

Recertification: Juniper certifications are valid for three years. For more information, see Recertification. 

Prior to taking this exam students should be able to:

• Identify the concepts, operations, or functionalities of Layer 2 switching for the Junos OS
• Describe the concepts, benefits, or functionalities of VLANs
• Demonstrate knowledge how to configure, monitor, or troubleshoot Layer 2 switching or VLANs
• Describe the concepts, benefits, operations, or functionalities of the Spanning Tree Protocol (STP)
• Identify the concepts, benefits, or operations of various Layer 2 protection or security features
• Identify the concepts, benefits, or operations of Layer 2 firewall filters
• Demonstrate knowledge how to configure, monitor, or troubleshoot Layer 2 security
• Identify the concepts, operations, or functionalities of various protocol-independent routing components
• Demonstrate knowledge how to configure, monitor, or troubleshoot various protocol-independent routing components
• Describe the concepts, operations, or functionalities of OSPF
• Demonstrate knowledge how to configure, monitor, or troubleshoot OSPF
• Describe the concepts, operations, or functionalities of IS-IS
• Demonstrate knowledge of how to configure, monitor, or troubleshoot IS-IS
• Describe the concepts, operations, or functionalities of BGP
• Demonstrate knowledge of how to configure, monitor, or troubleshoot BGP
• Identify the concepts, requirements, or functionalities of IP tunneling
• Demonstrate knowledge of how to configure, monitor, or troubleshoot IP tunnels
• Identify the concepts, benefits, applications, or requirements for high availability in a Junos OS environment
• Demonstrate knowledge of how to configure, monitor, or troubleshoot high availability components

Layer 2 Switching or VLANs

• Bridging components
• Frame processing
• Ports
• Tagging
• Native VLANs and voice VLANs
• Inter-VLAN routing
• Interfaces and ports
• VLANs
• Inter-VLAN routing

Spanning Tree

• STP and Rapid Spanning Tree Protocol (RSTP) concepts
• Port roles and states
• Bridge Protocol Data Units (BPDUs)
• Convergence and reconvergence
• STP
• RSTP

Layer 2 Security

• BPDU, loop or root protection
• Port security, including MAC limiting, DHCP snooping, Dynamic ARP inspection (DAI) or IP source guard
• MACsec
• Storm control
• Filter types
• Processing order
• Match criteria and actions
• Protection
• Port security
• Storm control
• Firewall filter configuration and application

Protocol Independent Routing

• Static, aggregate, and generated routes
• Martian addresses
• Routing instances, including routing information base (RIB) groups
• Load balancing
• Filter-based forwarding
• Static, aggregate, and generated routes
• Load balancing
• Filter-based forwarding

OSPF

• Link-state database
• OSPF packet types
• Router ID
• Adjacencies and neighbors
• Designated router (DR) and backup designated router (BDR)
• OSPF area and router types
• Realms
• Link-state advertisement (LSA) packet types
• Areas, interfaces, and neighbors
• Additional basic options
• Routing policy application
• Troubleshooting tools (ping, traceroute, traceoptions, show commands, logging)

IS-IS

• Link-state database
• IS-IS Protocol Data Units (PDUs)
• Type, length, and values (TLVs)
• Adjacencies and neighbors
• Levels and areas
• Designated intermediate system (DIS)
• Metrics
• Levels, interfaces, and adjacencies
• Additional basic options
• Routing policy application
• Troubleshooting tools (ping, traceroute, traceoptions, show commands, logging)

BGP

• BGP basic operation
• BGP message types
• Attributes
• Route/path selection process
• Internal and external BGP (IBGP and EBGP) functionality and interaction
• Groups and peers
• Additional basic options
• Routing policy application
• Troubleshooting tools (ping, traceroute, traceoptions, show commands, logging)

Tunnels

• Tunneling applications and considerations
• Generic Routing Encapsulation (GRE)
• IP-IP
• GRE
• IP-IP
• Troubleshooting tools (ping, traceroute, traceoptions, show commands, logging)

High Availability

• Link aggregation groups (LAG)
• Redundant trunk groups (RTG)
• Virtual chassis
• Graceful restart
• Graceful Routing Engine switchover (GRES)
• Nonstop active routing (NSR)
• Nonstop bridging (NSB)
• Bidirectional Forwarding Detection (BFD)
• Virtual Router Redundancy Protocol (VRRP)
• Unified In-Service Software Upgrade (ISSU)
• LAG and RTG
• Virtual chassis
• Graceful restart, GRES, NSB, and NSR
• VRRP
• ISSU
• Troubleshooting tools (traceoptions, show commands, logging)

It is recommended that prior to taking the exam students have followed the following training:

• JIR - Junos Intermediate Routing
• JEX - Junos Enterprise Switching

Prerequisite Certification: JNCIA-Junos