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Juniper JN0-364 Exam Syllabus Topics:

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

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Juniper Service Provider Routing and Switching, Specialist (JNCIS-SP) JN0-364 Prüfungsfragen mit Lösungen (Q161-Q166):

161. Frage
Which two LSA types are permuted in OSPF totally stubby areas? (Choose two.)

Antwort: A,B

Begründung:
In OSPF, a totally stubby area does not permit type 3 summary LSAs (inter-area routes) or type 5 external LSAs (routes from outside the OSPF domain) to be flooded into the area. The area border router (ABR) will only send a default route as a type 3 LSA into the totally stubby area.


162. Frage
What is the default route preference for an aggregate route?

Antwort: A

Begründung:
In the Junos OS architecture,route preference(often referred to as administrative distance in other vendor platforms) is the primary metric used by the Routing Engine to select the "best" path when multiple protocols provide a route to the same destination. Each routing protocol and route type is assigned a default numeric value; the lower the value, the more preferred the route.
According to Juniper Networks technical documentation, anaggregate routeis assigned a default preference of
130. Aggregate routes are a form of static-like route used to group specific routes into a single, broader prefix to reduce the size of routing tables and limit the scope of routing updates. They are "protocol-independent" because they are not learned from a dynamic neighbor but are manually defined by the administrator.
To understand where130fits in the hierarchy, it is helpful to compare it with other common Junos preferences:
* Directly connected interfaces:0
* Static routes:5
* OSPF Internal:10
* IS-IS Level 1/2:15/18
* Aggregate routes: 130
* OSPF AS External:150
* BGP (Internal and External):170
* Generated routes:150
By setting the aggregate route preference to 130, Junos ensures that specific routes learned via IGPs (like OSPF or IS-IS) are preferred over the aggregate. This is essential because an aggregate route is often used as a
"catch-all" or a discard route when more specific path information is missing. If the aggregate had a lower preference (like 5), it might override dynamic routing information, leading to suboptimal routing or black- holed traffic.


163. Frage
Which two statements regarding GRE and IP-IP tunnels are correct? (Choose two.)

Antwort: C,D

Begründung:
In Juniper Networks Junos OS,Generic Routing Encapsulation (GRE)andIP-in-IP (IP-IP)are common tunneling mechanisms used to transport packets across a network by encapsulating them within another protocol. Understanding the header structure and the limitations of these protocols is essential for proper MTU (Maximum Transmission Unit) management and security design.
Overhead (Option A):
Both GRE and IP-IP tunnels operate by adding an additional IP header to the original packet. An IP-IP tunnel (Protocol 4) adds a20-byteIPv4 header. A GRE tunnel (Protocol 47) adds the same20-bytedelivery IP header plus a minimum4-byteGRE header (totaling 24 bytes, which can increase if keys or sequencing are used).
Because these headers are added to the payload, the total size of the packet increases. This "overhead" means that if the original packet was already at the MTU limit (e.g., 1500 bytes), the encapsulated packet will exceed it, potentially leading to fragmentation or the need to adjust theTCP MSS (Maximum Segment Size).
Encryption (Option D):
Crucially, according to Juniper Service Provider documentation, neither GRE nor IP-IP provides native encryptionor data confidentiality. They are encapsulation protocols, not security protocols. The payload remains in cleartext and is visible to any device along the path. If security and encryption are required for data traversing these tunnels, they must be combined withIPsec (IP Security). While GRE is often used as the
"carrier" for IPsec (to allow multicast or dynamic routing protocols which IPsec alone does not support), the GRE protocol itself remains an unencrypted delivery mechanism. Therefore, statements A and D accurately describe the architectural behavior of these tunnel types.


164. Frage
Click the Exhibit button.

You have configured an MPLS LSP that begins on R1 and terminates on R5 using the Junos default settings.
Referring to the exhibit, which router will perform only label swap operations?

Antwort: A

Begründung:
With default MPLS behavior, the ingress router pushes a label, transit routers perform label swaps, the penultimate router pops the label (PHP), and the egress router receives the packet without the transport label. In the path R1-R5, R1 pushes the label, R4 performs the pop as the penultimate hop, and R5 is the egress. Therefore, the only router performing purely label swap operations is the intermediate transit router R3.


165. Frage
Click the Exhibit button. The routers shown in the exhibit are configured for segment routing. In this scenario, what is the adjacency SID that Router B advertises to Router A?

Antwort: D

Begründung:
The diagram you provided shows two routers, Router A and Router B, with MPLS labels between them. In the context of segment routing with MPLS, each router advertises a set of SIDs (Segment Identifiers). These SIDs can be node SIDs, which are associated with the router itself, or adjacency SIDs, which are associated with the links between routers.
Given the information from the exhibit:
Router A has a Router ID of 10.1.1.1 and is associated with the MPLS label 11. Router B has a Router ID of 10.1.1.2 and is associated with the MPLS label 12. The adjacency SID in segment routing is used to identify a specific adjacency between two routers. In this case, the question is asking for the adjacency SID that Router B advertises to Router A. This would be the label that Router B tells Router A to use to send packets directly to Router B over their shared adjacency.
So, the adjacency SID that Router B advertises would be associated with the link that Router A would use to send traffic to Router B, which is labeled with the number 12 in the exhibit.


166. Frage
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