Service Provider Routing and Switching, Specialist (JNCIS-SP) Practice Questions
Prepare for JN0-363 with more than an answer.
- Exam fee
- $300 USD
- Level
- Specialist
- Valid for
- 3 years
Domains covered on the exam 10
- Protocol-Independent Routing10%
- Open Shortest Path First (OSPF)15%
- Intermediate System to Intermediate System (IS-IS)15%
- Border Gateway Protocol (BGP)15%
- Layer 2 Bridging and VLANs12%
- Spanning-Tree Protocols8%
- Multiprotocol Label Switching (MPLS)15%
- IPv68%
- IP Tunnels5%
- High Availability7%
- 1
How does a Junos device learn about MAC addresses when it is first connected to an Ethernet LAN? A.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.B.The device sends out a network broadcast 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 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.D.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.
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Correct answer: D
- 2
Which two statements are correct about IS-IS interface metrics? (Choose two.)
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Correct answer: B, D
- 3
Which two statements are correct about BGP? (Choose two.)
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Correct answer: A, B
- 4
A service provider's core network utilizes OSPF as the IGP and LDP for label distribution. An engineer adds a new PE router, PE3, which successfully establishes OSPF adjacencies and LDP sessions with its neighbors. However, PE3 is unable to build a label-switched path (LSP) to the remote PE1 router. The command
show ldp sessionon PE3 confirms an active session to PE1's loopback address (192.168.255.1). Despite this, theshow route table mpls.0output on PE3 is empty. Which of the following is the most likely cause for this issue?graph TD PE1(PE1 lo0: 192.168.255.1) -- P1(P1) -- P2(P2) -- PE3(PE3 lo0: 192.168.255.3)Show answer details
Correct answer: B
LDP relies on the underlying IGP (OSPF in this case) to resolve the path to the remote LDP peer's transport address (typically the loopback). LDP uses this route from
inet.0to install the LSP information into theinet.3table. If the route to the remote peer's loopback is missing frominet.0, LDP cannot resolve the next hop, and no label information will be installed inmpls.0. Even though the LDP session is up (likely via directly connected interfaces), the LSP for the remote FEC cannot be built without the IGP route.
