300-420 Practice Test

What are two benefits of designing an SD-WAN network fabric with direct Internet access
implemented at
every site? (Choose two.)

A.

It decreases latency to applications hosted by public cloud service provider.

B.

It decreases latency on Internet circuits.

C.

It increases the speed of delivery of site deployments through zero-touch
provisioning.

D.

It increases the total available bandwidth on Internet circuits.

E.

It alleviates network traffic on MPLS circuits.

A client is moving to Model-Driven Telemetry and requires periodic updates. What must the network architect consider with this design?

A.

Updates that contain changes within the data are sent only when changes occur.

B.

Empty data subscriptions do not generate empty update notifications.

C.

Periodic updates include a full copy of the data that is subscribed to.

D.

The primary push update is sent immediately and cannot be delayed.

A company must automate a set of complex changes aligned with DR testing in the
network. These changes are specific, and the DR playbook will be adjusted in the future.
The playbook has diverse routing and switching assets in scope as well as multiple vendor
and hardware platforms. A developer will create a thin, web front-end microservice and
integrate with an Open daylight controller to push changes to the network. Which YANG
model should be used?

A.

Use a single native vendor YANG model to minimize development time

B.

Use an open YANG model to allow the reuse of code and standardize the
implementation across platforms

C.

Use multiple native vendor YANG models to provide code consistency.

D.

Develop an individualized YANG model to minimize development resources and time to
market.

An engineer must connect a new remote site to an existing OSPF network. The new site consists of two low-end routers, one for WAN, and one for LAN. There is no demand for traffic to pass through this area. Which area type does the engineer choose to provide minimal router resources utilization, while still allowing for full connectivity to the rest of the network?

A.

not so stubby

B.

totally not so stubby

C.

totally stubby area

D.

stubby area

Which two statements about VRRP object tracking are true? (Choose two)

A.

The priority of a VRRP device can change in accordance with the up or down
status of a VRRP object

B.

The VRRP interface priority must be manually configured by the administrator

C.

A VRRP group can track only one object at a time

D.

VRRP can track the status of interfaces and routes

E.

VRRP supports only interface tracking