Valid JN0-364 Exam Practice Material: Service Provider Routing and Switching, Specialist (JNCIS-SP) and Training Study Guide - Test4Cram

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Juniper JN0-364 Exam Syllabus Topics:

SectionWeightObjectives
Open Shortest Path First (OSPF)15-20%- LSA types and operation
- Areas and router types
- Link-state database
- Configuration and troubleshooting
Intermediate System to Intermediate System (IS-IS)10-15%- PDUs and TLVs
- Metrics and wide metrics
- Adjacencies and levels
- Configuration and monitoring
Tunnels5-8%- GRE and IP-IP tunnels
- Tunnel configuration and usage
Spanning Tree Protocols8-12%- BPDU and protection features
- Configuration and convergence
- Port roles and states
- STP, RSTP, MSTP, VSTP
IPv68-12%- Address types and format
- OSPFv3 and BGP for IPv6
- Autoconfiguration
- Static and dynamic routing
Border Gateway Protocol (BGP)20-25%- Path selection and attributes
- Basic operation and message types
- Policy and route filtering
- Configuration and troubleshooting
- IBGP and EBGP
Layer 2 Bridging and VLANs8-12%- Bridging concepts
- VLANs and trunking
- Service provider switching features
Multiprotocol Label Switching (MPLS)12-18%- Terminology and forwarding
- Segment routing basics
- LDP and RSVP
- Labels and LIB
- Configuration and monitoring
Protocol-Independent Routing10-15%- Martian addresses
- Load balancing
- Static, aggregate, and generated routes
- Filter-based forwarding
- Routing instances and RIB groups
High Availability5-8%- Graceful restart
- NSR and GRES concepts
- Nonstop active routing

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Juniper Service Provider Routing and Switching, Specialist (JNCIS-SP) Sample Questions (Q145-Q150):

NEW QUESTION # 145
During OSPF neighbor establishment, which packet type is used to describe the contents of the link-state database?

Answer: B

Explanation:
In theOSPF (Open Shortest Path First)protocol, ensuring that all routers within an area have a synchronized Link-State Database (LSDB)is fundamental to building a consistent loop-free topology. During the adjacency formation process-specifically when transitioning from theExStartstate to theExchangestate- routers must determine what information they are missing from their neighbors without sending the entire database at once, which would be highly inefficient.
TheDatabase Description (DBD)packet, also known as a DDP, is the mechanism used for this summary exchange. According to Juniper Networks technical documentation, the DBD packet does not contain full Link-State Advertisements (LSAs). Instead, it contains only theLSA headers, which include the LSA type, the ID of the advertising router, and the sequence number.
By exchanging these headers, a Juniper router can compare the neighbor's database summary against its own local LSDB. If the router identifies a header in the DBD packet that represents a newer or missing entry, it records that LSA in its "Link-State Request List." This collaborative "handshake" ensures that only the necessary, updated information is requested in the subsequentLink-State Request (LSR)phase. It is important to distinguish this from theLink-State PDU (LSP)mentioned in Option D, which is actually the term used in the IS-IS protocol, not OSPF. In OSPF, the functional unit is the LSA, and the transport vehicle for the initial summary is the DBD packet. This methodical synchronization is what allows OSPF to scale effectively in large service provider environments.


NEW QUESTION # 146
Which two statements are correct about segment routing? (Choose two.)

Answer: A,B

Explanation:
Segment routing is a source routing paradigm that allows a source router to define the path that a packet will take through the network by assigning an ordered list of segments--identifiers that specify a forwarding path for the packet through the network. Segment Routing can be implemented over an MPLS architecture or with IPv6 (SRv6).
Segment routing does not require a full mesh of adjacencies or state per transit path in the network, which is often the case with conventional MPLS signaling protocols like RSVP-TE. It leverages the existing IGP topology for forwarding without the need to maintain a state for each LSP (Label Switched Path), hence requiring very little resources to maintain.
In segment routing, labels (or segments) are distributed via IGP routing protocols like OSPF or IS-IS with extensions to carry segment routing information. These protocols are enhanced with Segment Routing extensions to distribute labels. For example, OSPFv2 is extended with Segment Routing extensions defined in RFC 8665.


NEW QUESTION # 147
Which configuration selling prohibits a static route from being redistributed by a dynamic routing protocol?

Answer: A

Explanation:
The no-readvertise policy statement is used to prevent a static route from being redistributed into a dynamic routing protocol. This setting ensures that routes that are configured statically are not advertised out via dynamic routing protocols such as OSPF or BGP.


NEW QUESTION # 148
During OSPF neighbor establishment, which packet type is used to describe the contents of the link-state database?

Answer: B

Explanation:
The Database Description packet is used during OSPF neighbor establishment to summarize the contents of a router's link-state database. It contains headers of the LSAs so neighboring routers can compare databases and determine which LSAs need to be requested to synchronize their databases.


NEW QUESTION # 149
Which new field is added to an IPv6 header as compared to IPv4?

Answer: D

Explanation:
The IPv6 header includes a new field that is not found in the IPv4 header, called the flow label.
The flow label in IPv6 is used to identify packets that require special handling by routers for quality of service (QoS) or other reasons, allowing these packets to be handled efficiently as they move through the network.


NEW QUESTION # 150
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