A Juniper MX router hosts two tenants. Tenant A uses routing instance 'A' and Tenant B uses routing instance 'B'. The engineer needs to allow Tenant A to reach a shared service (e.g., a DNS server) that is in routing instance 'B'. What is the most appropriate way to enable this cross-instance communication?

Place the shared service in both routing instances by duplicating its configuration.

Configure a static route in instance A pointing to the next-hop IP of the shared service in instance B.

Configure a logical tunnel interface between routing instance A and routing instance B, and add a static route in each instance.

Use a firewall filter to allow traffic from instance A to instance B.

A company is planning to deploy virtual networks on Juniper devices to support multiple business units. The network team wants to ensure that the solution is scalable and can accommodate future growth. Which design principle is most important for scalability?

Use a separate routing instance per business unit and standardize the configuration.

Use a flat network with VLANs for isolation.

Use a single routing instance and rely on policy-based routing for isolation.

Use a single routing instance for all business units to simplify management.

How do virtual networks ensure traffic isolation between tenants in a data center?

By encrypting all traffic with a shared key

By using separate routing instances and forwarding tables for each tenant

By using the same VLAN ID across all tenants

By assigning each tenant a unique physical switch

Which best practice helps manage the scalability of virtual networks in a large data center?

Deploying all virtual networks on a single device

Avoiding the use of routing instances altogether

Using the same interface for multiple tenants

Using a consistent naming convention for routing instances and interfaces

In a Juniper virtual network, what is the role of a routing instance?

It provides a separate routing table and forwarding table for a tenant or application

It manages physical interface configuration

It combines all tenant traffic into a single routing table

It encrypts traffic between tenants

Juniper NetworksCertified Specialist, Data Center (JNCIS-DC)

Domain 6Objective 4

Virtual Networks JN0-481 Practice Questions (Page 3)

Part of the Data Center Multitenancy domain, which makes up ~20% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~7–12 in this domain), expect 1–2 from this objective — we provide 17 practice questions to prepare you well beyond it. (estimate)

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Questions 11–15

11application · medium
A Juniper MX router hosts two tenants. Tenant A uses routing instance 'A' and Tenant B uses routing instance 'B'. The engineer needs to allow Tenant A to reach a shared service (e.g., a DNS server) that is in routing instance 'B'. What is the most appropriate way to enable this cross-instance communication?
Select an answer first
12application · medium
A company is planning to deploy virtual networks on Juniper devices to support multiple business units. The network team wants to ensure that the solution is scalable and can accommodate future growth. Which design principle is most important for scalability?
Select an answer first
13foundation · easy
How do virtual networks ensure traffic isolation between tenants in a data center?
Select an answer first
14foundation · easy
Which best practice helps manage the scalability of virtual networks in a large data center?
Select an answer first
15foundation · easy
In a Juniper virtual network, what is the role of a routing instance?
Select an answer first

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