A service provider uses a single MX router to serve two customers. Customer A requires a VRF with full Internet routing, and Customer B requires a VRF with only a default route. Both customers use APBR to steer Office 365 traffic to a dedicated link. The provider wants to minimize the number of routing instances and configuration complexity. Which approach is most efficient?

Create one VRF for Customer A and use a firewall filter to limit Customer B's routes.

Create a virtual router for Customer A and a VRF for Customer B.

Create one VRF for both customers and use APBR to differentiate traffic.

Create two separate VRF instances, one for each customer, and apply APBR policies to each.

What is the primary purpose of routing instance isolation in Junos?

To combine multiple physical devices into a single logical router

To allow multiple routing tables to coexist on the same device without interfering with each other

To increase the routing table size limit on the device

To enable faster routing lookups by using a single shared routing table

Which of the following is isolated between routing instances in Junos?

Routing tables, interfaces, and forwarding tables

A network engineer is troubleshooting a connectivity issue. A host in a VRF cannot reach a server that is reachable from the default routing instance. The engineer confirms that the server's route is present in the default routing table but not in the VRF. What is the most likely reason for this?

The server's IP address is not reachable from the VRF's interface.

The VRF is not configured with a vrf-import policy to accept the route from the default instance.

The VRF does not have an interface in the same subnet as the server.

The VRF is using a different routing protocol than the default instance.

A network architect is designing a solution where two VRFs need to exchange routes with each other, but only for specific prefixes. The architect also wants to use APBR to steer traffic between the VRFs based on application. Which configuration approach is correct?

Configure static routes in each VRF pointing to the other VRF's interfaces.

Configure a logical tunnel between the VRFs and rely on dynamic routing protocols to exchange routes.

Configure both VRFs in the same routing instance and use firewall filters to separate traffic.

Configure vrf-import and vrf-export policies on both VRFs to control route exchange, and apply APBR policies to each VRF.

Juniper NetworksCertified Professional, Security (JNCIP-SEC)

Domain 6Objective 3

Routing Instances JN0-637 Practice Questions (Page 1)

Part of the Advanced Policy-Based Routing (APBR) domain, which makes up ~10% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~4–6 in this domain), expect 1–2 from this objective — we provide 16 practice questions to prepare you well beyond it. (estimate)

16questions here

4free pages

4concepts

Questions 1–5

1expert · hard
A service provider uses a single MX router to serve two customers. Customer A requires a VRF with full Internet routing, and Customer B requires a VRF with only a default route. Both customers use APBR to steer Office 365 traffic to a dedicated link. The provider wants to minimize the number of routing instances and configuration complexity. Which approach is most efficient?
Select an answer first
2foundation · easy
What is the primary purpose of routing instance isolation in Junos?
Select an answer first
3foundation · easy
Which of the following is isolated between routing instances in Junos?
Select an answer first
4application · medium
A network engineer is troubleshooting a connectivity issue. A host in a VRF cannot reach a server that is reachable from the default routing instance. The engineer confirms that the server's route is present in the default routing table but not in the VRF. What is the most likely reason for this?
Select an answer first
5expert · hard
A network architect is designing a solution where two VRFs need to exchange routes with each other, but only for specific prefixes. The architect also wants to use APBR to steer traffic between the VRFs based on application. Which configuration approach is correct?
Select an answer first

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