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Juniper JN0-364 Exam Syllabus Topics:

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

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Juniper Service Provider Routing and Switching, Specialist (JNCIS-SP) Sample Questions (Q167-Q172):

NEW QUESTION # 167
Which IS-IS packet type will establish and maintain neighbor relationships?

A. partial sequence number PDU
B. hello PDU
C. update PDU
D. link-state PDU

Answer: B

Explanation:
In theIS-IS (Intermediate System to Intermediate System)protocol, communication between routers is performed usingProtocol Data Units (PDUs). To discover neighbors and maintain adjacencies, IS-IS relies on theHello PDU (IIH - IS-IS Hello).
According to Juniper Networks technical documentation, when IS-IS is enabled on an interface, the router begins transmitting Hello PDUs to a multi-destination address (multicast). These PDUs contain essential information such as the router'sSystem ID, its configuredArea Addresses, and itsLevel capability(Level 1, Level 2, or both). For two routers to become neighbors, they must exchange these Hello PDUs and agree on specific parameters, such as the MTU of the link and the hello/hold timers.
Once an adjacency is established, the Hello PDU serves as a "keepalive" mechanism. If a router stops receiving Hello PDUs from a neighbor for a duration exceeding theHolding Time, it assumes the neighbor is down and flushes the associated Link-State PDUs (LSPs) from its database.
To clarify the other options:
* Link-State PDU (Option A):These are used to distribute actual topology and reachability information, not to form adjacencies.
* Partial Sequence Number PDU (Option C):PSNPs are used on point-to-point links to acknowledge the receipt of LSPs or to request missing LSPs.
* Update PDU (Option D):This is not a standard IS-IS term; in IS-IS, updates are handled via the flooding of LSPs.

NEW QUESTION # 168
When considering BGP route propagation, which two statements are correct? (Choose two.)

A. IBGP speakers send routes learned from EBGP neighbors to IBGP neighbors.
B. EBGP speakers send routes learned from IBGP neighbors to IBGP neighbors.
C. EBGP speakers send routes learned from EBGP neighbors to IBGP neighbors.
D. IBGP speakers send routes learned from IBGP neighbors to IBGP neighbors.

Answer: A,B

NEW QUESTION # 169
What happens if an IS-IS router receives a link-state PDU with a higher sequence number than the one in its database?

A. It updates its database and floods the link-state PDU.
B. It resets the adjacency with the source of the link-state PDU.
C. It ignores the link-state PDU.
D. It sends a CSNP to request confirmation from the source of the link-state PDU.

Answer: A

Explanation:
IS-IS is a link-state protocol that relies on the rapid and consistent flooding ofLink-State PDUs (LSPs)to ensure that every router in an area has an identical view of the topology. To manage the "freshness" of information, IS-IS uses aSequence Number-a 32-bit unsigned integer that increments every time the originating router makes a change to its LSP.
According to Juniper Networks technical documentation, when a router receives an LSP, it performs a comparison between the received LSP and the version it currently holds in itsLink-State Database (LSDB).
If the received LSP has ahigher sequence number, the router concludes that this is "newer" and more accurate information. The router will then perform two immediate actions:
* Update:It replaces the older LSP in its LSDB with the newly received version.
* Flood:It propagates the new LSP to all other neighbors (except the one that sent it) to ensure the entire area converges on the new data.
If the sequence numbers were equal, the router would ignore the incoming PDU as it already has the information. If the received sequence number werelower, the router would conclude its own database is more recent and would actually send its own "newer" version back to the neighbor to bring them up to date (a process called "poisoning" or refreshing the neighbor).Complete Sequence Number PDUs (CSNPs)(Option C) are used during initial database synchronization or periodic checks on broadcast links, but the primary response to a "newer" LSP is immediate database update and flooding.

NEW QUESTION # 170
How does a Junos device learn about MAC addresses when II is first connected to an Ethernet LAN?

A. The device learns the source MAC addresses from traffic in the network and stores this MAC address in addition to the interface from which the traffic was received.
B. The device sends out a network multicast message asking for all devices and MAC addresses on the network and stores this Information in addition to the interface from which the response was received.
C. The device sends out a network broadcast message asking tor all devices and MAC addresses on the network and stores this information In addition lo the interface from which the response was received.
D. The device learns the destination MAC addresses from traffic in the network and stores this MAC address in addition to the interface from which the traffic was received.

Answer: A

Explanation:
Junos devices learn about MAC addresses by examining the source MAC address of frames received on an interface and then storing these MAC addresses in the MAC address table (also known as the forwarding database) along with the interface on which the traffic was received.

NEW QUESTION # 171
When would you use the qualified-next-hop statement with a static route?

A. You can use it to resolve the next hop if the next hop is not directly connected.
B. You can use it to specify multiple next hops with different preferences.
C. You can use it to install the static route into different routing tables.
D. You can use it to send unwanted traffic to a null route.

Answer: B

Explanation:
Qualified next hops allow you to associate one or more properties with a particular next-hop address. You can set an overall preference for a particular static route and then specify a different preference for the qualified next hop. For example, suppose two next-hop addresses (10.10.10.10 and 10.10.10.7) are associated with the static route 192.168.47.5/32. A general preference is assigned to the entire static route, and then a different preference is assigned to only the qualified next-hop address 10.10.10.7. For example:
The qualified-next-hop statement with a static route is used to specify multiple next hops for a static route with different preferences (priorities). This allows for more granular control over the path selection process in the event that the primary next hop becomes unreachable.

NEW QUESTION # 172
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