Service Provider Routing and Switching, Specialist (JNCIS-SP) exam test & JN0-364 test training material

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Juniper JN0-364 Exam Syllabus Topics:

SectionObjectives
Multiprotocol Label Switching (MPLS)- Demonstrate knowledge of how to configure, monitor, or troubleshoot MPLS
  • 1. Shortest path segment-routing LSPs
  • 2. RSVP-signaled Label-Switched Paths (LSPs)
  • 3. LDP-signaled Label-Switched Paths (LSPs)
  • 4. MPLS forwarding
- Identify the concepts, operation, or functionality of MPLS CoS processing on Junos devices
  • 1. LDP
  • 2. MPLS and routing tables
  • 3. Labels and the label information base
  • 4. End-to-end packet flow and forwarding
  • 5. MPLS packet header
  • 6. RSVP
  • 7. Segment routing with MPLS
  • 8. MPLS terminology
Spanning Tree Protocols- Demonstrate knowledge of how to configure, monitor, or troubleshoot Spanning Tree Protocols
  • 1. STP
  • 2. MSTP
  • 3. VSTP
  • 4. RSTP
- Identify the concepts, operation, or functionality of STP
  • 1. STP
  • 2. MSTP
  • 3. VSTP
  • 4. RSTP
Protocol-Independent Routing- Demonstrate knowledge of how to configure, monitor, or troubleshoot various protocol-independent routing components
  • 1. Filter-based forwarding
  • 2. Static, aggregate, and generated routes
  • 3. Load balancing
- Identify the concepts, operation, or functionality of various protocol-independent routing components
  • 1. Routing instances, including routing information base (RIB) (also known as routing table) group
  • 2. Martian addresses
  • 3. Filter-based forwarding
  • 4. Static, aggregate, and generated routes
  • 5. Load balancing
Open Shortest Path First (OSPF)- Identify the concepts, operation, or functionality of OSPF
  • 1. Link-state advertisement (LSA) packet type
  • 2. Link-state database
  • 3. OSPF packet types
  • 4. OSPF area and router types
  • 5. Designated router and backup designated router
  • 6. Router ID
  • 7. Adjacencies and neighbors
- Demonstrate knowledge of how to configure, monitor, or troubleshoot OSPF
  • 1. Interfaces and neighbor
  • 2. Troubleshooting tools
  • 3. Routing policy application
Intermediate System to Intermediate System (IS-IS)- Identify the concepts, operation, or functionality of IS-IS
  • 1. Type, length, values (TLVs)
  • 2. Levels and areas
  • 3. Designated intermediate system (DIS)
  • 4. Link-state database
  • 5. IS-IS protocol data units (PDUs)
  • 6. Metrics
  • 7. Adjacencies and neighbors
- Demonstrate knowledge of how to configure, monitor, or troubleshoot IS-IS
  • 1. Troubleshooting tools
  • 2. Interfaces and adjacencies
  • 3. Routing policy application
Layer 2 Bridging or VLANs- Demonstrate knowledge of how to configure, monitor, or troubleshoot Layer 2 bridging or VLANs
  • 1. VLANs
  • 2. Interfaces and ports
  • 3. IRB
  • 4. Provider bridging
- Identify the concepts, operation, or functionality of Layer 2 bridging for the Junos OS
  • 1. Bridging elements and terminology
  • 2. Service provider switching platforms
  • 3. Provider bridging (Q-in-Q tunneling)
  • 4. Virtual Switches
  • 5. Frame processing
- Identify the concepts, benefits, or functionality of VLANs
  • 1. Port modes
  • 2. Integrated Routing and Bridging (IRB)
  • 3. Tagging
Border Gateway Protocol (BGP)- Identify the concepts, operation, or functionality of BGP
  • 1. Route selection process
  • 2. BGP route reflection and confederations
  • 3. IBGP and EBGP functionality and interaction
  • 4. Attributes
  • 5. BGP message types
  • 6. BGP basic operation
- Demonstrate knowledge of how to configure, monitor, or troubleshoot BGP
  • 1. Peers and peer groups
  • 2. Troubleshooting tools
  • 3. Routing policy application
IPv6- Identify the concepts, operation, or functionality of IPv6
  • 1. Static routes
  • 2. IPv6 over IPv4 tunneling
  • 3. Dynamic routing - OSPFv3, IS-IS, BGP
- Demonstrate knowledge of how to configure, monitor, or troubleshoot IPv6

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JN0-364 Exam Labs, New JN0-364 Test Questions

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Juniper Service Provider Routing and Switching, Specialist (JNCIS-SP) Sample Questions (Q123-Q128):

NEW QUESTION # 123
What prevents routing loops in a single-area OSPF network?

Answer: A

Explanation:
In OSPF, loop prevention within a single area is achieved through the fundamental nature of its link-state architecture. Unlike distance-vector protocols that rely on "routing by rumor," OSPF ensures that every router within an area maintains an identicalLink-State Database (LSDB). This database acts as a complete map of the network topology.
Once the LSDB is synchronized, each router independently executes theShortest Path First (SPF) algorithm
, which is formally known as theDijkstra algorithm. This mathematical process treats the local router as the
"root" of a tree and calculates the shortest path to every other node (router) and prefix in the area based on the cumulative interface costs. Because every router uses the same synchronized map (the LSDB) and the same deterministic algorithm, they all arrive at a consistent, loop-free view of the best paths.
According to Juniper Networks technical documentation, the Dijkstra algorithm is superior to theBellman- Ford algorithm(used by distance-vector protocols like RIP) in this regard. Bellman-Ford is susceptible to
"count-to-infinity" problems and loops because routers only know the distance and direction to a destination provided by their neighbors, rather than the full topology. In OSPF, even if a link fails, the updated Link-State Advertisement (LSA) is flooded rapidly, and the Dijkstra algorithm is re-run to find a new loop-free path.
Routing policies(Option B) are used to manipulate path selection or filter routes but are not the primary mechanism for fundamental loop prevention in OSPF. Similarly,forwarding policies(Option D) govern how traffic is handled at the data plane level rather than determining the control plane's loop-free topology.


NEW QUESTION # 124
Click the Exhibit button.

Which destination IP address will be matched by the aggregate route shown in the exhibit?

Answer: B

Explanation:
The aggregate route is 10.16.2.0/23. A /23 prefix covers the address range from 10.16.2.0 through 10.16.3.255. Therefore, any destination within that range will match the aggregate route.
The address 10.16.3.79 falls within this range, so packets destined for that address match the aggregate route.


NEW QUESTION # 125
Exhibit:

You must configure the router called ROUTER_1 to take all valid prefixes learned from internal BGP peers in AS 64523, and then re-advertise them to other internal BGP peers in the same autonomous system.
Referring to the exhibit, which configuration must you deploy on ROUTER_1 to accomplish this task?

Answer: A

Explanation:
In theBorder Gateway Protocol (BGP), theSplit Horizonrule is a fundamental loop-prevention mechanism for internal sessions. This rule dictates that a BGP speaker must not advertise a route learned from anInternal BGP (IBGP)peer to any other IBGP peer within the same Autonomous System (AS). This ensures that routes do not circulate infinitely inside a network, as IBGP does not modify the AS_PATH attribute. Consequently, to maintain full reachability, a network normally requires a "full mesh" of IBGP sessions, where every BGP- speaking router is directly peered with every other router.
In the provided exhibit,ROUTER_1is part of AS 64523. The requirement is for ROUTER_1 to take prefixes learned from its internal peers and re-advertise them to other internal peers in the same AS. This behavior is a direct violation of the standard Split Horizon rule. According to Juniper Networks technical documentation, the standard solution to scale IBGP without a full mesh is to configureRoute Reflection.
When a router is configured as aRoute Reflector (RR), it is permitted to "reflect" (re-advertise) routes learned from one IBGP peer to another. In Junos OS, the mechanism to enable Route Reflection is to configure acluster IDwithin the BGP group. By adding the cluster keyword followed by a unique 32-bit identifier (usually the router's loopback address) to the internal BGP group configuration, the router assumes the role of an RR. It then follows specific reflection rules:
* Routes learned from anEBGP peerare reflected to all IBGP peers.
* Routes learned from aRoute Reflector Clientare reflected to all other clients and non-clients.
* Routes learned from anon-clientare reflected to all clients.
Option A is incorrect because BGP advertisement rules are hard-coded; a standard export policy cannot override the Split Horizon rule. Option C handles traffic engineering tags but does not enable route reflection.
Option D would change the session to EBGP, which does not address the internal reachability requirement within AS 64523. Therefore, configuring the cluster ID is the only valid way to achieve the desired re- advertisement behavior.


NEW QUESTION # 126
Referring to the exhibit, which two statements are correct? (Choose two.)

Answer: A,D

Explanation:
In the given exhibit, interface ge-0/0/0 is configured to accept VLANs 101-120 and ge-0/0/1 is configured with flexible VLAN tagging, which means it can tag traffic with any VLAN ID specified.
However, only VLAN 200 is explicitly mentioned for ge-0/0/1. A. Traffic tagged with VLAN 101 will pass through ge-0/0/0 and will egress on ge-0/0/1 with the same VLAN tag, because the VLAN ID is within the allowed range on both interfaces. B. VLAN 100 is not specified in the allowed VLAN range for ge-0/0/0 (which is 101-120), nor is it specified under ge-0/0/1. Therefore, it will be dropped.


NEW QUESTION # 127
Click the Exhibit button. Referring to the exhibit, R1 is advertising prefix 203.0.113.0/24 to R2 over EBGP. R2 is configured to advertise this prefix into IBGP. R3 receives the 203.0.113.0/24 route, however the route is hidden.
Which configuration statement do you need to add to R2 to solve this problem?

Answer: B

Explanation:
R2 is advertising the EBGP-learned route into iBGP without changing the next-hop, so R3 receives the route with a next-hop of 172.16.10.1 (R1). Because that next-hop is not reachable from R3, Junos marks the route as hidden. Setting next-hop self on R2 makes the next-hop reachable (R2), so the route becomes usable on R3.


NEW QUESTION # 128
......

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