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JN0-364 is the current JNCIS-SP exam, released on February 2, 2026 after JN0-363 reached end of life. The live blueprint covers protocol-independent routing, OSPF, IS-IS, BGP, service-provider Layer 2 switching, spanning tree, MPLS, IPv6, tunnels, and high availability. Juniper lists JNCIA-Junos as the prerequisite certification and describes JN0-364 as a 90-minute, 65-question exam using Junos OS 25.2.
The exam is broad because a service-provider network is built from interacting control planes and forwarding layers. A route can be learned by an IGP or BGP, labels can steer traffic across an MPLS path, VLAN or provider-bridging functions can carry Layer 2 services, IPv6 can coexist with IPv4, and high-availability mechanisms can change the active path during failure. Candidates need a model that connects those functions.
Juniper certifications place JNCIA-Junos before JN0-364, with JN0-664 for JNCIP-SP available as the professional-level continuation. The specialist exam should therefore establish reliable routing, MPLS, and troubleshooting fundamentals that can support advanced VPN and scaling topics later.
Before studying dynamic protocols, candidates should understand static, aggregate, and generated routes, martian addresses, routing instances, RIB groups, load balancing, and filter-based forwarding. These features explain how Junos can maintain several routing contexts and choose paths even when no IGP or BGP update is involved.
A configuration line does not guarantee an active route. The next hop must be resolvable, the route must compete successfully with alternatives, and policy or table context can change the result. The right study habit is to inspect the routing table and forwarding state after every change instead of assuming success.
Routing instances and RIB groups are especially important preparation for later service-provider VPN topics. They introduce the idea that one physical router can maintain separate logical routing information and deliberately share selected routes between contexts.
The JN0-364 blueprint includes the link-state database, OSPF packet types, router IDs, adjacencies, DR and BDR roles, areas, router types, LSAs, routing policy, and troubleshooting. These details form a sequence: interfaces participate, neighbors discover one another, adjacencies exchange state, the database converges, routes are calculated, policy is applied, and the routing table installs usable paths.
Troubleshooting should follow the same sequence. If the neighbor is missing, do not start with route preference. If the adjacency is healthy but a prefix is absent, inspect the database and policy. If the route is present but traffic fails, move to forwarding and the next layer of the service path.
A service-provider lab should include at least two areas or enough topology to make convergence visible. Fail a link, watch the adjacency and route state change, and explain why the surviving path wins. The goal is not merely to know the names of OSPF packets but to interpret network state.
JN0-364 includes IS-IS databases, PDUs, TLVs, adjacencies, levels, areas, DIS behavior, metrics, policy, and troubleshooting. IS-IS is widely relevant in service-provider environments, so candidates should become comfortable with its own terminology rather than translating everything into OSPF terms.
Build a small Level 1 or Level 2 topology and observe adjacency formation and route propagation. Then introduce a metric or policy change and verify the route result. Comparing the same topology under OSPF and IS-IS helps candidates see both the shared link-state principles and the protocol-specific mechanics.
The professional JNCIP-SP level expands IS-IS further, so the specialist objective should be strong enough that route leaking, summarization, and more complex policy later have a clear foundation.
BGP objectives include messages, attributes, route selection, IBGP and EBGP interaction, groups, peers, basic options, and routing policy. The candidate should learn to follow one prefix from receipt through policy to path selection and onward advertisement. This creates a repeatable method for almost every BGP scenario.
If the route is missing, identify the stage where it disappeared. A failed session, rejected import, worse path, unresolved next hop, routing-table conflict, or blocked export are different problems. One of the most valuable BGP skills is proving what the router knows before changing configuration.
At JNCIP-SP, BGP expands into communities, regular expressions, scaling, route reflection, multiprotocol behavior, damping, and flowspec. JN0-364 is where the underlying session, attribute, path-selection, and policy logic should become automatic.
The Layer 2 section includes service-provider switching platforms, bridging terminology, frame processing, virtual switches, provider bridging, VLAN port modes, tagging, IRB, and Q-in-Q. Candidates should be able to trace the frame headers as customer traffic enters, crosses, and exits the provider domain.
Q-in-Q is best understood as preserving customer VLAN information while adding a provider-level service tag. This allows a provider to transport multiple customer VLANs without making the customer tag the provider’s only identifier. A lab with captures at ingress and egress makes the encapsulation model much easier to remember.
IRB connects the switching and routing worlds. When traffic leaves a bridged domain for a routed destination, candidates should know which logical interface performs the Layer 3 function and how that route participates in the wider network.
JN0-364 includes STP, RSTP, MSTP, and VSTP, along with port roles, BPDUs, convergence, reconvergence, and protection features. The service-provider context changes the scale and service model, but the underlying danger of a Layer 2 loop remains the same.
Study each variant by the problem it solves. RSTP improves convergence over classic STP. MSTP allows multiple spanning-tree instances with VLAN mapping. VSTP provides per-VLAN behavior in Junos environments. The candidate should still understand root selection and why specific ports forward or block.
Protection features such as BPDU, loop, or root protection should be tested with controlled topology changes. Observing the port state and log is more useful than memorizing which feature sounds safest.
The current blueprint covers MPLS terminology, label headers, forwarding, the label information base, interaction with routing tables, RSVP, LDP, and segment routing with MPLS. Start with the data plane: a packet is associated with a forwarding equivalence class, a label is imposed, intermediate routers swap labels, and the egress removes or interprets the label to continue forwarding.
Then learn how the control plane supplies the label information. LDP distributes labels based largely on routing reachability. RSVP can signal label-switched paths with additional path and resource considerations. Segment routing encodes a path using segments and changes how explicit paths can be built. At specialist level, the candidate should understand the operational purpose and state of each.
A lab should display both IP and label forwarding state. Trace one packet across several nodes and write the label operation at each hop. When the path fails, determine whether the issue is IGP reachability, label distribution, the LSP, or the service using it.
JN0-364 includes IPv6 static routing, OSPFv3, IS-IS, BGP, IPv6-over-IPv4 tunneling, and GRE. Candidates should be comfortable reading IPv6 prefixes, verifying neighbor and route state, and recognizing when an IPv6 problem is really an IPv4 underlay or tunnel problem.
A dual-stack lab is ideal. Build reachability with both address families, then carry one family across a tunnel. Break the tunnel underlay and observe how the overlay fails. Restore the underlay and then introduce a routing-policy problem. The symptoms will look different if the candidate knows which layer to inspect.
Prefix reasoning is still fundamental. Candidates who are slow with subnet relationships should strengthen CIDR thinking and then apply the same discipline to IPv6 prefixes.
LAG, graceful restart, GRES, NSB, NSR, BFD, and VRRP all appear in the current objectives. Each addresses a different part of availability. Link aggregation provides multiple physical members. BFD accelerates failure detection. VRRP provides first-hop redundancy. Graceful and nonstop mechanisms attempt to preserve forwarding or protocol state during control-plane events.
Candidates should always ask what state is preserved and what alternate path exists. Rapid detection with no backup path still produces an outage. A backup gateway that cannot reach the destination does not provide useful redundancy. A routing process that restarts gracefully can still be affected by an unrelated interface failure.
Use timed failover labs. Generate traffic continuously, trigger one failure, and measure how the network reacts. Then inspect protocol and forwarding state to explain the interruption or successful continuity. Availability becomes meaningful when it is observed.
Before the final integrated scenario, verify that every protocol has a corresponding operational view: neighbor state for the IGPs, received and active paths for BGP, label bindings and LSP state for MPLS, VLAN and spanning-tree state for bridging, and failover state for HA. This keeps troubleshooting evidence attached to the control plane that produced it.
Combine the domains into one scenario. A customer frame enters a provider edge, is classified into the appropriate Layer 2 or routed service, crosses an IGP-enabled core, follows BGP or policy where required, receives MPLS labels, survives a link failure, and reaches the far side. Then introduce a fault and identify the earliest state that no longer matches expectation.
That integrated model prepares candidates for JN0-664, where Layer 2 and Layer 3 VPNs, advanced BGP, multicast, class of service, and more complex IGP behavior depend on the same fundamentals. The professional topics become far easier when label forwarding, routing policy, and failure convergence already make sense.
JN0-364 is therefore not best approached as ten separate objective lists. It is a study of how a service-provider network builds reachability, transports services, labels traffic, maintains multiple address families, and preserves forwarding during change. Candidates who can explain that complete path have a stronger foundation than those who only recognize the vocabulary.
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