JNCIP-ENT study guide
JNCIP-ENT · Work through your exam, one topic at a time.
JNCIP-ENT - Enterprise Routing and Switching, Professional - is the third of four certifications in the Juniper Enterprise Routing and Switching track, sitting above JNCIA-Junos and JNCIS-ENT and below JNCIE-ENT. It targets experienced networking professionals who already hold advanced knowledge of Junos OS and want to prove depth in advanced routing technologies plus the related platform configuration and troubleshooting skills. The JNCIP-ENT study guide has 8 sections and about 2,281 words.
01Interior Gateway Protocols (IGPs)
JNCIP-ENT tests Junos-level OSPF and IS-IS design and troubleshooting: adjacency formation, area and level boundaries, summarization, authentication, and route selection. You must be able to explain why a neighbor stays down and how a summary changes what other routers learn.
306 words, about 2 min02BGP
This domain tests eBGP and iBGP behavior in Junos: next-hop reachability, best-path selection, route reflection, communities, and policy. The exam expects you to trace why a route is present in BGP but absent from the forwarding table.
283 words, about 1 min03IP Multicast
JNCIP-ENT tests PIM sparse and dense mode, RPF, IGMP, rendezvous points, and SSM. You must know how a receiver join becomes forwarding state and why a multicast packet is dropped.
289 words, about 1 min04Ethernet Switching and Spanning Tree
This domain tests VLAN membership, trunking, RSTP/MSTP/VSTP, root election, and loop protection on Junos switches. You must predict which port blocks and why.
287 words, about 1 min05Layer 2 Authentication and Access Control
JNCIP-ENT tests 802.1X, MAC RADIUS, captive portal, RADIUS profiles, and dynamic VLAN assignment on Junos access switches. You must know the roles and the order of authentication methods.
266 words, about 1 min06IP Telephony Features
This domain tests voice VLANs, LLDP-MED, Power over Ethernet, and QoS treatment for IP phones on Junos switches. You must know how a phone learns its voice VLAN and how the switch prioritizes signaling and media.
300 words, about 2 min07Class of Service (CoS)
JNCIP-ENT tests classification, scheduling, shaping, policing, rewrite rules, and drop profiles in Junos. You must trace a packet forwarding class and loss priority from ingress to egress.
266 words, about 1 min08EVPN
JNCIP-ENT tests EVPN control-plane concepts and Junos configuration: MP-BGP EVPN routes, VXLAN data plane, route targets, ESI multihoming, and anycast gateways. You must explain why a MAC or IP prefix is missing from a remote VTEP.
284 words, about 1 min