Free Access to Juniper.JN0-649.v2026-03-25.q126 with Valid Practice Test (Page 24)

Question 111

Which address range is used for source-specific multicast?

A.239.0.0.0/8
B.233.0.0.0/8
C.232.0.0.0/8
D.224.2.0.0/16

Question 112

Referring to the exhibit, which LSA type is used to advertise 192.168.1.0/24 to R5?

A.Type 5
B.Type 4
C.Type 3
D.Type 7

Question 113

Which statement is correct about IS-IS?

A.IS-IS uses areas and an autonomous system.
B.Level 1/2 routers automatically inject a default route to the nearest Level 1 router.
C.Level 2 routers must share the same area address.
D.Level 1 routers route traffic between autonomous systems.

Question 114

Referring to the exhibit, which statement is correct?

A.The route is learned from a multihop BGP session.
B.The route is learned from only one neighbor.
C.The route is learned from a multipath BGP session.
D.The route is learned from three different neighbors.

Question 115

Your enterprise network uses routing instances to support multitenancy. Your Junos devices use BGP to peer to multiple BGP devices. You must ensure that load balancing is achieved within the routing instance.
Which two statements would accomplish this task? (Choose two.)

A.Configure the multipath option at the [edit protocols bgp group <group-name> neighbor] hierarchy.
B.Configure the multipath option at the [edit protocols bgp group] hierarchy.
C.Configure a load-balance per-packet policy and apply it at the [edit routing-options forwarding-table] hierarchy.
D.Configure the multipath option at the [edit routing-instances <instance-name> routing-options] hierarchy.

Correct Answer: C,D

* Multitenancy with Routing Instances:
* In a multitenant network, different tenants are isolated using routing instances.
* Each routing instance can have its own routing table and policies.
* BGP and Load Balancing:
* BGP (Border Gateway Protocol) is often used for interconnecting different autonomous systems or for internal routing.
* Load balancing in BGP can be achieved using the multipath feature, which allows the installation of multiple paths to the same destination in the routing table.
* Additionally, configuring per-packet load balancing ensures that traffic is distributed across multiple paths more granularly.
* Configuring Multipath in BGP:
* Hierarchy Considerations: The multipath option must be configured at appropriate hierarchies to ensure it applies to the correct scope (either globally or within a specific routing instance).
Detailed Configuration:
Statement C: Configure a load-balance per-packet policy and apply it at the [edit routing-options forwarding-table] hierarchy.
* Correct: Configuring a load-balance per-packet policy ensures that packets are distributed evenly across multiple paths. This is crucial for achieving effective load balancing.
Configuration Example:
shell
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set routing-options forwarding-table export load-balance-per-packet
Policy Definition Example:
shell
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set policy-options policy-statement load-balance-per-packet term 1 then load-balance per-packet Statement D: Configure the multipath option at the [edit routing-instances <instance-name> routing-options] hierarchy.
* Correct: Configuring multipath within a routing instance ensures that the load balancing feature is applied specifically to that instance, which is crucial in a multitenant environment.
Configuration Example:
shell
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set routing-instances <instance-name> routing-options multipath
References:
* Useful Juniper Commands
* Juniper Routing Instances and Multipath Configuration
These configurations ensure that load balancing is achieved within each routing instance, leveraging both per-packet load balancing and the multipath feature in Junos OS for BGP. By configuring at the forwarding-table and routing-instance levels, you ensure the load balancing behavior is correctly applied to achieve the desired network performance and redundancy.

Question 111

Question 112

Question 113

Question 114

Question 115

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