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JNCDS-SP Free Sample Questions

12 free sample questions120 in the full practice test

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JN0-1362 Sample Questions

  1. Question 1

    Intermediate

    Service Provider Core WAN Design · MPLS signaling protocols

    You are designing a Service Provider core network that requires fast reroute capabilities for MPLS Label Switched Paths (LSPs). The network must support strict bandwidth reservations and explicit path control. Which MPLS signaling protocol should you select for the primary LSP setup?

    Answer and explanation

    Correct answer: C

    RSVP-TE is the correct choice because it supports explicit path control, bandwidth reservation, and fast reroute (FRR) capabilities like link protection and node protection. LDP builds LSPs based solely on IGP metrics (shortest path) and does not natively support bandwidth reservations or explicit path engineering.

  2. Question 2

    Intermediate

    Service Provider Edge WAN Design · Layer 2 Services

    A customer requires a Layer 2 VPN service to connect three geographically dispersed sites. They need the ability to run their own Spanning Tree Protocol (STP) transparently across the service provider network without interaction with the provider's STP domains. Which service type best fits this requirement?

    Answer and explanation

    Correct answer: B

    VPLS provides a multipoint-to-multipoint Ethernet service that emulates a LAN. It transparently forwards Layer 2 frames, allowing the customer to run their own control plane protocols like STP across the WAN, as if the sites were connected to a single switch.

  3. Question 3

    IntermediateMultiple answers

    Network Availability and Traffic Prioritization · Fate Sharing

    Which TWO statements regarding the 'fate-sharing' concept in network availability design are correct? (Select TWO)

    Answer and explanation

    Correct answers: A, C

    This is a classic definition of fate sharing; if the physical conduit is cut, both 'redundant' circuits fail simultaneously.

    SRLGs allow the network designer to tag links that share physical resources (fate) so that signaling protocols like RSVP-TE can ensure primary and backup paths do not use links in the same group.

  4. Question 4

    Beginner

    Network Availability and Traffic Prioritization · CoS Design

    You are designing a Class of Service (CoS) policy for a Service Provider edge router. You need to classify customer traffic based on the DSCP value in the IP header as it enters the interface. Which type of classifier is most appropriate for this task?

    Answer and explanation

    Correct answer: B

    BA classifiers examine the CoS value in the packet header (such as DSCP for IP, EXP for MPLS, or 802.1p for Ethernet) to determine the forwarding class and loss priority. This is the standard method for trusting and mapping existing markings.

  5. Question 5

    Advanced

    Data Center WAN Design · EVPN

    In a Data Center Interconnect (DCI) design, you are using EVPN-MPLS to extend Layer 2 connectivity between two sites. Which BGP route type is primarily responsible for advertising MAC address reachability between the PE routers?

    Answer and explanation

    Correct answer: D

    Type 2 routes in EVPN are used to advertise MAC addresses (and optionally IP addresses) of hosts. This allows the PE routers to learn which MAC addresses are reachable via which remote PE, enabling the control-plane learning that distinguishes EVPN from VPLS.

  6. Question 6

    Beginner

    WAN Security · BGP Flowspec

    True or False: BGP Flowspec allows a Service Provider to distribute traffic filtering rules, such as dropping packets from a specific source IP, directly to the routing control plane of edge routers.

    Answer and explanation

    Correct answer: A

    True. BGP Flowspec (RFC 5575) extends BGP to carry flow specification rules (filters) that can match on packet headers (src/dst IP, port, protocol) and apply actions like discard, rate-limit, or redirect, effectively turning routers into distributed firewalls for DDoS mitigation.

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