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JN0-361 Real Exam Questions

Service Provider Routing and Switching, Specialist (JNCIS-SP)

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Question 1 Multiple choice

You have recently installed a second Routing Engine (RE) in your router

Which two statements correctly describe the expected behavior if the primary RE fails? (Choose two.)

  1. A

    The backup RE will assume the master role once the packet forwarding engine restarts

  2. B

    The backup RE will immediately assume the master role

  3. C

    The new master RE restarts the routing protocol process (rpd) and establishes any required adjacencies based on the configuration.

  4. D

    The new master RE maintains the existing protocol adjacencies initially established by the previous master RE

Show answer and explanation

Correct answers: A, C

Question 2 Multiple choice

Which two statements are true about MPLS VPNs? (Choose two.)

  1. A

    With Layer 3 VPNs, the provider's routers participate in the customer's Layer 3 routing.

  2. B

    MPLS VPNs are designed to run over private networks rather than the public Internet.

  3. C

    With Layer 2 VPNs, the provider does not participate in the routing of the customer's private IP traffic.

  4. D

    MPLS VPN tunnels are always encrypted.

Show answer and explanation

Correct answers: A, C

Question 3 Single choice

-- Exhibit --

user@router# show interfaces
xe-0/0/0 {
unit 0 {
family inet {
address 192.168.12.1/24;
}
family mpls;
}
}
xe-0/0/1 {
encapsulation ethernet-ccc;
unit 0 {
family ccc;
}
}
lo0 {
unit 0 {
family inet {
address 1.1.1.1/32;
}
}
}

[edit]
user@router# show protocols
mpls {
interface all;
}
ospf {
traffic-engineering;
area 0.0.0.0 {
interface all;
}
}
ldp {
interface all;
}
l2circuit {
neighbor 2.2.2.2 {
interface xe-0/0/1.0 {
}
}
}
-- Exhibit --

Click the Exhibit button.

In the exhibit, which configuration element is missing to bring up the Layer 2 circuit?

  1. A

    the route target

  2. B

    the virtual circuit ID

  3. C

    a targeted LDP session

  4. D

    an MPLS LSP

Show answer and explanation

Correct answer: B

Question 4 Single choice

What is required on the egress and ingress devices to transport IPv6 traffic across an IPv4 network?

  1. A

    An IP-IP interface

  2. B

    A TE tunnel interface

  3. C

    A GRE tunnel interface

  4. D

    A 6to 4 tunnel interface

Show answer and explanation

Correct answer: C

Question 5 Single choice

You are asked to design a Layer 2 switched topology that can automatically recover from link failures.

Which type of protocol would you consider in your design?

  1. A

    GSTP

  2. B

    LLDP

  3. C

    LFM

  4. D

    MSTP

Show answer and explanation

Correct answer: D

Question 6 Single choice

You are asked to configure and apply a new routing policy to influence routing advertisements received from a specific EBGP peer.
In this scenario, which statement is true?

  1. A

    The new policy should be applied as an export policy for the specific EBGP peer.

  2. B

    The new policy should be applied as an import policy for the specific EBGP peer.

  3. C

    The new policy should be applied as an export for the EBGP group in which the peer is defined.

  4. D

    The new policy should be applied as an import policy for the EBGP group in which the peer is defined.

Show answer and explanation

Correct answer: B

Question 7 Single choice

A network administrator has been asked to configure the most specific aggregate route to summarize the
four specific prefixes shown below:

10. .5.0/24
10. .12.0/24
10. .17.0/24
10. .21.0/24

Which configuration completes this task?

  1. A

    [edit routing-options]
    user@router# show
    aggregate {
    route 10. .0.0/19;
    }

  2. B

    [edit routing-options]
    user@router# show
    aggregate {
    route 10. .0.0/20;
    }

  3. C

    [edit routing-options]
    user@router# show
    aggregate {
    route 10. .0.0/21;
    }

  4. D

    [edit routing-options]
    user@router# show
    aggregate {
    route 10. .0.0/18;
    }

Show answer and explanation

Correct answer: A

Question 8 Multiple choice

By default, which three criteria are used by the Junos load-balancing algorithm to determine a traffic flow? (Choose three.)

  1. A

    protocol

  2. B

    source port

  3. C

    destination port

  4. D

    source address

  5. E

    destination address

Show answer and explanation

Correct answers: A, D, E

Question 9 Multiple choice

What are two types of BPDUs in the Spanning Tree Protocol? (Choose two.)

  1. A

    configuration

  2. B

    hello

  3. C

    topology change notification

  4. D

    link state

Show answer and explanation

Correct answers: A, C

Question 10 Single choice

Which statement about Rapid Spanning Tree Protocol (RSTP) is correct?

  1. A

    If a device configured for RSTP receives STP BPDUs, it sends STP BPDUs.

  2. B

    If a device configured for RSTP receives STP BPDUs, it forwards them as STP BPDUs.

  3. C

    If a device configured for RSTP receives STP BPDUs, it continues to send RSTP BPDUs.

  4. D

    If a device configured for RSTP receives STP BPDUs, it sends RSTP and STP BPDUs.

Show answer and explanation

Correct answer: B

Explanation

Enhancements enable RSTP to achieve sub-second forwarding and network convergence. RSTP is backward-compatible with legacy STP. If legacy STP BPDU is detected on a link, then an RSTP-capable bridge will revert to legacy STP on that given port.

References:
https://www.juniper.net/techpubs/en_US/junos12.3/topics/concept/mx-series-rstp-port-states-roles.html