What is the purpose of a RIB group in Junos OS?

To share routes between different routing instances by importing routes into multiple RIBs

To combine multiple routing protocols into a single protocol for simplified configuration

To create a backup routing table for failover purposes

To filter routes before they are installed in the routing table

An administrator is configuring a new routing instance on a Junos device. The instance must be able to run OSPF and must have its own routing table. The administrator has already created the instance and assigned interfaces. What additional configuration is required to enable OSPF within the instance?

Set the instance type to virtual-router and then restart the routing process.

Add the instance name to the OSPF configuration under protocols ospf.

Create a RIB group to import OSPF routes into the instance.

Configure the instance type as forwarding.

A service provider is deploying a new service that requires multiple routing instances on a single router. The provider needs to share some routes between instances, but also needs to maintain strict isolation for other routes. What is the most appropriate way to achieve this?

Use a single routing instance with multiple routing tables.

Use multiple routing instances and RIB groups to selectively share routes.

Use policy statements to copy routes between tables without RIB groups.

Use firewall filters to control route sharing between instances.

How does a routing instance isolate routing information from other instances?

By using different routing protocols for each instance

By maintaining a separate routing table for each instance

By encrypting the routing updates between instances

By assigning different autonomous system numbers to each instance

Which configuration hierarchy is used to assign an interface to a routing instance in Junos OS?

set policy-options policy-statement customer-a term 1 from interface ge-0/0/1.0

set interfaces ge-0/0/1 unit 0 family inet address 192.0.2.1/24

set protocols bgp group customer-a neighbor 192.0.2.2

set routing-instances customer-a interface ge-0/0/1.0

Juniper NetworksCertified Associate, Data Center

Domain 3Objective 3

Routing Instances and RIB Groups JN0-281 Practice Questions (Page 4)

Part of the Protocol-Independent Routing domain, which makes up ~16% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~6–10 in this domain), expect 1–2 from this objective — we provide 21 practice questions to prepare you well beyond it. (estimate)

21questions here

5free pages

8concepts

Questions 16–20

16foundation · easy
What is the purpose of a RIB group in Junos OS?
Select an answer first
17application · medium
An administrator is configuring a new routing instance on a Junos device. The instance must be able to run OSPF and must have its own routing table. The administrator has already created the instance and assigned interfaces. What additional configuration is required to enable OSPF within the instance?
Select an answer first
18expert · hard
A service provider is deploying a new service that requires multiple routing instances on a single router. The provider needs to share some routes between instances, but also needs to maintain strict isolation for other routes. What is the most appropriate way to achieve this?
Select an answer first
19foundation · easy
How does a routing instance isolate routing information from other instances?
Select an answer first
20foundation · easy
Which configuration hierarchy is used to assign an interface to a routing instance in Junos OS?
Select an answer first

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