Juniper JN0-664 Online Practice Questions and Exam Preparation

Juniper JN0-664 Online Questions & Answers

• Question 61:

  Referring to the exhibit

  

  You must provide VRF Internet access over a single connection for VPN-A Site 1, which connects to PE-1. Which two statements are correct in this scenario? (Choose two.)

  A. You must use the RIB group to move interface routes from the inet.0 table to the VPN-A.inet.0 table.
  B. You must use the RIB group to move a default route, which is learned through BGP, from the inet.0 table to the VPN-A.inet.0 table.
  C. You do not need to use the RIB group to move interface routes from the inet.0 table to the VPN-A.inet.0 table.
  D. You do not need to use the RIB group default route, which is learned through BGP, from the inet.0 table to the VPN-A.inet.0 table.
  A. You must use the RIB group to move interface routes from the inet.0 table to the VPN-A.inet.0 table.
  B. You must use the RIB group to move a default route, which is learned through BGP, from the inet.0 table to the VPN-A.inet.0 table.

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  Explanation/Reference:

• Question 62:

  You have an L2VPN connecting two CEs across a provider network. The CEs and provider network are conU setting.

  You use the ping command from one CE to the other CE with a size of 1500 bytes.

  In this scenario, which statement is correct when using the ping command?

  A. You expect an ICMP message too long error.
  B. You expect an echo reply.
  C. You expect a silent discard.
  D. You expect the ping results to be fragmented.
  C. You expect a silent discard.

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  Explanation/Reference:

  according to juniper documentation configuring L2VPN.

  Layer 2 VPNs don't support fragmentation in the provider network. It is critical that the provider network supports the largest frame that the CE devices can generate after the MPLS and virtual routing and forwarding (VRF) labels are added by

  the PE devices. This example leaves the CE devices at the default 1500-byte maximum transmission unit (MTU) while configuring the provider core to support a 4000 byte MTU. This configuration avoids discards by ensuring the CE devices

  cannot exceed the MTU in the provider's network.

• Question 63:

  You are responding to an RFP for a new MPLS VPN implementation. The solution must use LDP for signaling and support Layer 2 connectivity without using BGP The solution must be scalable and support multiple VPN connections over a single MPLS LSP The customer wants to maintain all routing for their Private network

  In this scenario, which solution do you propose?

  A. circuit cross-connect
  B. BGP Layer 2 VPN
  C. LDP Layer 2 circuit
  D. translational cross-connect
  C. LDP Layer 2 circuit

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  Explanation/Reference:

  AToM (Any Transport over MPLS) is a framework that supports various Layer 2 transport types over an MPLS network core. One of the transport types supported by AToM is LDP Layer 2 circuit, which is a point-to-point Layer 2 connection that uses LDP for signaling and MPLS for forwarding. LDP Layer 2 circuit can support Layer 2 connectivity without using BGP and can be scalable and efficient by using a single MPLS LSP for multiple VPN connections. The customer can maintain all routing for their private network by using their own CE switches.

• Question 64:

  Referring to the exhibit

  

  You are con guring an interprovider Option C Layer 3 VPN to connect two customer sites.

  Which three statements are correct? (Choose three.)

  A. ASBR routers maintain the internal routes from its own AS, the loopback address from the other AS PEs, and the L3VPN routes.
  B. ASBR routers maintain the internal routes from its own AS and the loopback addresses from the other AS PEs.
  C. P routers maintain the internal routes from its own AS and the loopback address from the other AS PEs.
  D. P routers only maintain the internal routes from their own AS.
  E. PE routers maintain the internal routes from its own AS, the loopback address from the other AS Pes, and the L3VPN routes.
  B. ASBR routers maintain the internal routes from its own AS and the loopback addresses from the other AS PEs.
  D. P routers only maintain the internal routes from their own AS.
  E. PE routers maintain the internal routes from its own AS, the loopback address from the other AS Pes, and the L3VPN routes.

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  Explanation/Reference:

• Question 65:

  Referring to the exhibit.

  

  Which two statements about the configuration shown in the exhibit are correct? (Choose two.)

  A. This VPN connects customer sites that use different AS numbers.
  B. This VPN connects customer sites that use the same AS number
  C. A Layer 2 VPN is configured.
  D. A Layer 3 VPN is configured.
  A. This VPN connects customer sites that use different AS numbers.
  D. A Layer 3 VPN is configured.

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  Explanation/Reference:

  The configuration shown in the exhibit is for a Layer 3 VPN that connects customer sites that use different AS numbers. A Layer 3 VPN is a type of VPN that uses MPLS labels to forward packets across a provider network and BGP to exchange routing information between PE routers and CE routers. A Layer 3 VPN allows customers to use different routing protocols and AS numbers at their sites, as long as they can peer with BGP at the PE-CE interface. In this example, CE-1 is using AS 65530 and CE-2 is using AS 65531, but they can still communicate through the VPN because they have BGP sessions with PE-1 and PE-2, respectively.

• Question 66:

  Referring to the exhibit

  

  You are troubleshooting an issue for a customer site that uses 10.10.0.0/24 in AS 65224, but you see another AS in the AS path. What is the cause of the problem?

  A. AS 65000 is pre-pending AS 65137 to route advertisements.
  B. The local AS is in the process of withdrawing the route from AS 65137.
  C. AS 65137 is advertising the 10.10.0.0/24 prefix.
  D. The local AS is receiving two equal cost routes to 10.10.0.0/24.
  C. AS 65137 is advertising the 10.10.0.0/24 prefix.

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  Explanation/Reference:

• Question 67:

  Which three statements about IS-IS in a multi-area network are correct? (Choose three.)

  A. Internal L1 PDUs are flooded to all L1 routers in other areas.
  B. External L2 PDUs are only flooded to the local area's L2 routers.
  C. Internal L1 PDUs are flooded to the local area's L2 routers.
  D. External L2 PDUs are flooded to all L2 routers in other areas.
  E. Internal L1 PDUs are only flooded to the local area's L1 routers.
  C. Internal L1 PDUs are flooded to the local area's L2 routers.
  D. External L2 PDUs are flooded to all L2 routers in other areas.
  E. Internal L1 PDUs are only flooded to the local area's L1 routers.

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  Explanation/Reference:

• Question 68:

  Which two statements about IS-IS are correct? (Choose two.)

  A. CSNPs are used to request a missing LSP.
  B. PSNPs are used to acknowledge a received LSP.
  C. PSNPs are used to request a missing LSP.
  D. CSNPs are used to acknowledge a received LSP.
  B. PSNPs are used to acknowledge a received LSP.
  C. PSNPs are used to request a missing LSP.

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  Explanation/Reference:

• Question 69:

  Referring to the exhibit.

  

  What do the brackets [ ] in the AS path identify?

  A. They identify the local AS number associated with the AS path if configured on the router, or if AS path prepending is configured
  B. They identify an AS set, which are groups of AS numbers in which the order does not matter
  C. They identify that the autonomous system number is incomplete and awaiting more information from the BGP protocol.
  D. They identify that a BGP confederation is being used to ensure that there are no routing loops.
  A. They identify the local AS number associated with the AS path if configured on the router, or if AS path prepending is configured

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  Explanation/Reference:

• Question 70:

  Referring to the exhibit.

  

  You want to implement the BGP Generalized TTL Security Mechanism (GTSM) on the network

  Which three statements are correct in this scenario? (Choose three)

  A. You can implement BGP GTSM between R2, R3, and R4
  B. BGP GTSM requires a firewall filter to discard packets with incorrect TTL.
  C. You can implement BGP GTSM between R2 and R1.
  D. BGP GTSM requires a TTL of 1 to be configured between neighbors.
  E. BGP GTSM requires a TTL of 255 to be configured between neighbors.
  B. BGP GTSM requires a firewall filter to discard packets with incorrect TTL.
  C. You can implement BGP GTSM between R2 and R1.
  E. BGP GTSM requires a TTL of 255 to be configured between neighbors.

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  Explanation/Reference: