Juniper JN0-664 Online Practice Questions and Exam Preparation

Juniper JN0-664 Online Questions & Answers

• Question 51:

  Which two statements are correct about reflecting inet-vpn unicast prefixes in BGP route reflection? (Choose two.)

  A. Route reflectors do not change any existing BGP attributes by default when advertising routes.
  B. A BGP peer does not require any configuration changes to become a route reflector client.
  C. Clients add their originator ID when advertising routes to their route reflector
  D. Route reflectors add their cluster ID to the AS path when readvertising client routes.
  A. Route reflectors do not change any existing BGP attributes by default when advertising routes.
  D. Route reflectors add their cluster ID to the AS path when readvertising client routes.

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  Explanation/Reference:

• Question 52:

  Referring to the exhibit.

  

  Which statement is true?

  A. The 10.101.1.0/24 route will be shared if the vrf-table-label parameter is configured.
  B. The 10.101.1.0/24 route will only be shared if BGP is configured in the routing instance
  C. The 10.101.1 0/24 route will be shared if there are other VRFs that use the same route target community
  D. The 10.101.1.0/24 route will be shared if the auto-export parameter is configured
  D. The 10.101.1.0/24 route will be shared if the auto-export parameter is configured

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  Explanation/Reference:

  The auto-export parameter is a routing option that allows a routing instance to share routes with other routing instances or the master routing table. The auto-export parameter automatically exports routes from one routing instance to another based on the route target communities attached to the routes. In this scenario, the 10.101.1.0/24 route will be shared if the auto-export parameter is configured under [edit routing-options] hierarchy level.

• Question 53:

  Which two statements are correct about a sham link? (Choose two.)

  A. It creates an OSPF multihop neighborship between two PE routers.
  B. It creates a BGP multihop neighborship between two PE routers.
  C. The PEs exchange Type 1 OSPF LSAs instead of Type 3 OSPF LSAs for the L3VPN routes
  D. The PEs exchange Type 3 OSPF LSAs instead of Type 1 OSPF LSAs for the L3VPN routes.
  B. It creates a BGP multihop neighborship between two PE routers.
  C. The PEs exchange Type 1 OSPF LSAs instead of Type 3 OSPF LSAs for the L3VPN routes

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  Explanation/Reference:

• Question 54:

  Referring to the exhibit.

  

  R4 is directly connected to both RPs (R2 and R3) R4 is currently sending all ,o,ns upstream to R3 but you want all joins to go to R2 instead Referring to the exhibit, which configuration change will solve this issue?

  A. Change the bootstrap priority on R2 to be higher than R3
  B. Change the default route in inet.2 on R4 from R3 as the next hop to R2
  C. Change the local address on R2 to be higher than R3.
  D. Change the group-range to be more specific on R2 than R3.
  C. Change the local address on R2 to be higher than R3.

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  Explanation/Reference:

• Question 55:

  You are configuring schedulers to define the class-of-service properties of output queues. You want to control packet drops during periods of congestion. In this scenario, which CoS configuration parameter would be used to accomplish this task?

  A. buffer size
  B. priority
  C. shaping rate
  D. drop profile
  D. drop profile

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  Explanation/Reference:

• Question 56:

  By default, which statement is correct about OSPF summary LSAs?

  A. All Type 2 and Type 7 LSAs will be summanzed into a single Type 5 LSA
  B. The area-range command must be installed on all routers.
  C. Type 3 LSAs are advertised for routes in Type 1 LSAs.
  D. The metric associated with a summary route will be equal to the lowest metric associated with an individual contributing route
  C. Type 3 LSAs are advertised for routes in Type 1 LSAs.

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  Explanation/Reference:

  OSPF uses different types of LSAs to describe different aspects of the network topology. Type 1 LSAs are also known as router LSAs, and they describe the links and interfaces of a router within an area. Type 3 LSAs are also known as summary LSAs, and they describe routes to networks outside an area but within the same autonomous system (AS). By default, OSPF will summarize routes from Type 1 LSAs into Type 3 LSAs when advertising them across area boundaries .

• Question 57:

  Referring to the exhibit.

  

  Which three statements are correct about route 10 0 0.0/16 when using the default BGP advertisement rules'? (Choose three.)

  A. R1 will prepend AS 65531 when advertising 10 0.0 0/16 to R2.
  B. R1 will advertise 10.0.0.0/16 to R2 with 192 168 1 1 as the next hop.
  C. R2 will advertise 10.0.0.0/16 to R3 with 192.168.1 1 as the next hop
  D. R4 will advertise 10 0.0 0/16 to R6 with 172.16 1 1 as the next hop
  E. R2 will advertise 10.0.0.0/16 to R4 with 172.16.1.1 as the next hop
  B. R1 will advertise 10.0.0.0/16 to R2 with 192 168 1 1 as the next hop.
  D. R4 will advertise 10 0.0 0/16 to R6 with 172.16 1 1 as the next hop
  E. R2 will advertise 10.0.0.0/16 to R4 with 172.16.1.1 as the next hop

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  Explanation/Reference:

• Question 58:

  When using OSPFv3 for an IPv4 environment, which statement is correct?

  A. OSPFv3 only supports IPv4.
  B. OSPFv3 supports both IPv6 and IPv4, but not in the same routing instance.
  C. OSPFv3 is not backward compatible with IPv4
  D. OSPFv3 supports IPv4 only on interfaces with family inet6 defined
  D. OSPFv3 supports IPv4 only on interfaces with family inet6 defined

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  Explanation/Reference:

• Question 59:

  Referring to the exhibit,

  

  You are receiving the 192.168 0 0/16 route on both R3 and R4 from your EBGP neighbor You must ensure that R1 and R2 receive both BGP routes from the route reflector In this scenario, which BGP feature should you configure to accomplish this behavior?

  A. add-path
  B. multihop
  C. multipath
  D. route-target
  C. multipath

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  Explanation/Reference:

• Question 60:

  Which three mechanisms are used by Junos platforms to evaluate incoming traffic for CoS purposes? (Choose three )

  A. rewrite rules
  B. behavior aggregate classifiers
  C. traffic shapers
  D. fixed classifiers
  E. multifield classifiers
  B. behavior aggregate classifiers
  D. fixed classifiers
  E. multifield classifiers

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  Explanation/Reference:

  Junos platforms use different mechanisms to evaluate incoming traffic for CoS purposes, such as:

  Behavior aggregate classifiers: These classifiers use a single field in a packet header to classify traffic into different forwarding classes and loss priorities based on predefined or user-defined values.

  Fixed classifiers: These classifiers use a fixed field in a packet header to classify traffic into different forwarding classes and loss priorities based on predefined values.

  Multifield classifiers: These classifiers use multiple fields in a packet header to classify traffic into different forwarding classes and loss priorities based on user- defined values and filters.

  Rewrite rules and traffic shapers are not used to evaluate incoming traffic for CoS purposes, but rather to modify or shape outgoing traffic based on CoS policies.