JN0-664 Service Provider Routing and Switching, Professional (JNCIP-SP) exam
Proctored multiple-choice knowledge exam mapped to the published Juniper objectives and the current software scope named on the official page.
- Type
- Written
- Delivery
- Both
- Duration
- 90 min
- Questions
- 65
Exam sections
OSPF
Candidates encounter Describe the concepts, operation, or functionality of OSPFv2 and OSPFv3: OSPF area types and operations Link-state advertisement (LSA) flooding through an OSPF multi-area network Designated router/backup designated router operation Shortest-path-first (SPF) algorithm Metrics, including external metric types Summarize and restrict routes Virtual links OSPFv2 vs. OSPFv3 Given a scenario, demonstrate knowledge of how to configure or monitor single-area or multi-area OSPF: Implement OSPF routing policy in the OSPF domain. The section links platform knowledge to practical consequences, including dependencies, trade-offs, validation methods, and recoverable failure conditions. Its place in JNCIP-SP becomes clearer when candidates follow inputs and outcomes into IS-IS.
Question notes
The wording may test depth through verbs such as identify, explain, configure, analyze, or troubleshoot. Match preparation depth to those verbs throughout the published OSPF outline. Anchor your response in the OSPF scope published for Service Provider Routing and Switching, Professional (JNCIP-SP) exam.
Preparation tips
Pair official reading with retrieval practice: close the material, reconstruct the OSPF workflow, and check the result against the blueprint. Record gaps by subtopic instead of repeatedly rereading the entire section. Use mistakes from the exercise to create a focused revision list for Service Provider Routing and Switching, Professional (JNCIP-SP) exam.
IS-IS
Candidates encounter Describe the concepts, operation, or functionality of IS-IS: IS-IS areas/levels and operations Label-switched path (LSP) flooding through an IS-IS multi- area network Designated intermediate system (DIS) operation SPF algorithm Metrics, including wide metrics Route summarization and route leaking Given a scenario, demonstrate knowledge of how to configure or monitor single-area or multi-area IS-IS: Implement IS-IS routing policy in the IS-IS domain. The section links platform knowledge to practical consequences, including dependencies, trade-offs, validation methods, and recoverable failure conditions. That context distinguishes IS-IS knowledge from generic familiarity with Junos OS and Juniper networking platforms.
Question notes
Questions can move between planning and operations, requiring candidates to recognize prerequisites, select a method, and anticipate how the completed change should be validated. This distinction matters specifically to Service Provider Routing and Switching, Professional (JNCIP-SP) exam and its role-focused assessment boundary.
Preparation tips
Use the official outline to design several decision scenarios for IS-IS. For each one, state the requirement, reject at least one tempting alternative, and justify the final approach in product-specific terms. Keep the final notes organized under IS-IS so gaps remain traceable to the published outline.
BGP
The BGP domain draws its boundaries around Describe the concepts, operation, or functionality of BGP: BGP route selection process Next-hop resolution BGP attributes—concept and operation BGP communities Regular expressions Multipath Multihop Load balancing Advanced BGP options BGP route damping BGP flowspec Multiprotocol BGP Describe the concepts, operation, or functionality of BGP scaling mechanisms: Route reflection Given a scenario, demonstrate knowledge of how to configure or monitor BGP: Implement BGP routing policy. It tests the candidate's ability to organize those details into a coherent product workflow rather than recall them as unrelated facts. That context distinguishes BGP knowledge from generic familiarity with Junos OS and Juniper networking platforms.
Question notes
Expect the assessment to probe distinctions between closely related options and to place BGP inside scenarios where requirements determine the best response. This distinction matters specifically to Service Provider Routing and Switching, Professional (JNCIP-SP) exam and its role-focused assessment boundary.
Preparation tips
Build a small scenario around BGP, perform or diagram the relevant workflow, then explain why each choice is appropriate and what evidence would reveal a mistake. Use the official subtopics as a checklist after the exercise. Close the session by explaining how this work supports service provider routing and switching design, implementation, operations, and troubleshooting without consulting notes.
Class of Service (CoS)
Class of Service (CoS) brings together Describe the concepts, operation, or functionality of Junos OS CoS: CoS processing on Junos OS devices CoS header fields Forwarding classes Classification Packet loss priority Policers Schedulers Drop profiles Rewrite rules Given a scenario, demonstrate knowledge of how to configure or monitor CoS. The section matters because it tests whether candidates can translate official product knowledge into defensible choices for realistic service provider routing and switching design, implementation, operations, and troubleshooting scenarios. In Service Provider Routing and Switching, Professional (JNCIP-SP) exam, the topic belongs to a broader assessment of service provider routing and switching design, implementation, operations, and troubleshooting.
Question notes
The domain can appear through direct knowledge checks as well as short operational or design scenarios; pay close attention to scope, constraints, and the action verb in each prompt. Anchor your response in the Class of Service (CoS) scope published for Service Provider Routing and Switching, Professional (JNCIP-SP) exam.
Preparation tips
Translate every published subtopic in Class of Service (CoS) into an action: configure it, locate it, analyze its output, or explain its effect. Revisit any item that you can define but cannot apply. Retest the same skill from an operator, designer, or customer perspective that matches JNCIP-SP.
IP Multicast
The official outline places Describe the concepts, operation, or functionality of IP multicast: Components of IP multicast, including multicast addressing IP multicast traffic flow Any-source multicast (ASM) versus source-specific multicast (SSM) Reverse path forwarding (RPF)—concept and operation Internet Group Management Protocol (IGMP) Physical Interface Module (PIM) dense mode and sparse mode Rendezvous point (RP)—concept, operation, discovery, election Source-specific multicast (SSM)—requirements, benefits, address ranges Anycast rendezvous point (RP) Given a scenario within IP Multicast. Candidates need to understand how the pieces relate, when each one is relevant, and what a sound result looks like in the context of Junos OS and Juniper networking platforms. That context distinguishes IP Multicast knowledge from generic familiarity with Junos OS and Juniper networking platforms.
Question notes
Scenario questions may omit irrelevant implementation detail while preserving the requirement that decides the answer. Identify that deciding constraint before comparing the available options. For JNCIP-SP, this domain should be interpreted alongside Layer 3 VPNs, not as a disconnected topic.
Preparation tips
Translate every published subtopic in IP Multicast into an action: configure it, locate it, analyze its output, or explain its effect. Revisit any item that you can define but cannot apply. Keep the final notes organized under IP Multicast so gaps remain traceable to the published outline.
Layer 3 VPNs
Layer 3 VPNs focuses on Describe the concepts, operation, or functionality of Layer 3 VPNs: Traffic flow—control and data planes Full mesh versus hub-and-spoke topology VPN-IPv4 addressing Route distinguishers Route targets Route distribution Site of origin Sham links Virtual routing and forwarding (VRF) table-label Next-generation multicast virtual private networks (MVPNs) Flow of control and data traffic in a MVPN Layer 3 VPN scaling IPv6 Layer 3 VPNs Layer 3 VPN Internet access options Given a scenario, demonstrate knowledge of how to configure or monitor the components of. The useful preparation boundary is not only what each item means, but how it changes planning, implementation, analysis, or support decisions in service provider routing and switching design, implementation, operations, and troubleshooting. That context distinguishes Layer 3 VPNs knowledge from generic familiarity with Junos OS and Juniper networking platforms.
Question notes
Candidates should be ready for prompts that connect more than one objective, especially where Layer 3 VPNs influences security, availability, performance, governance, or supportability. Keep the candidate profile for JNCIP-SP in mind when choosing between a theoretical and an operationally useful response.
Preparation tips
Write several misleading answer choices for an assessment scenario in Layer 3 VPNs and explain precisely why each is wrong. This exposes weak distinctions and makes official terminology easier to apply under exam pressure. Compare your explanation with the provider's terminology before treating the topic as complete.
Layer 2 VPNs
Layer 2 VPNs examines Describe the concepts, operation, or functionality of BGP Layer 2 VPNs: Traffic flow—control and data planes Forwarding tables Connection mapping Layer 2 VPN network layer reachability information (NLRI) Route distinguishers Route targets Layer 2 VPN scaling Describe the concepts, operation, or functionality of LDP Layer 2 circuits: Traffic flow—control and data planes Virtual circuit label Autodiscovery (AD) Layer 2 interworking Describe the concepts, operation, or functionality of virtual private LAN service (VPLS): Traffic flow—control and data. Candidates should be able to connect these elements to service provider routing and switching design, implementation, operations, and troubleshooting and recognize how decisions in this area affect the surrounding Junos OS and Juniper networking platforms solution. This framing keeps the section aligned with the role expectations behind JNCIP-SP.
Question notes
The wording may test depth through verbs such as identify, explain, configure, analyze, or troubleshoot. Match preparation depth to those verbs throughout the published Layer 2 VPNs outline. The strongest answer should remain consistent with the wider goal of service provider routing and switching design, implementation, operations, and troubleshooting.
Preparation tips
Pair official reading with retrieval practice: close the material, reconstruct the Layer 2 VPNs workflow, and check the result against the blueprint. Record gaps by subtopic instead of repeatedly rereading the entire section. Record one concrete example you could discuss in an interview for JNCIP-SP.