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Juniper JN0-213 Practice Test - Questions Answers, Page 7

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Which component of a software-defined networking (SDN) controller defines where data packets are forwarded by a network device?

A.
the operational plane
A.
the operational plane
Answers
B.
the forwarding plane
B.
the forwarding plane
Answers
C.
the management plane
C.
the management plane
Answers
D.
the control plane
D.
the control plane
Answers
Suggested answer: B

Explanation:

Theforwarding plane(also known as the data plane) of a software-defined networking (SDN) controller is responsible for forwarding data packets based on the instructions given by the control plane23.It handles all activities involving data packets sent by the end-user, including forwarding of packets2. Reference from Juniper site:GeeksforGeeks,SDxCentral

Which two statements are true about the CN2 controller? (Choose two.)

A.
A CN2 controller communicates with CN2 vRouters using BGP.
A.
A CN2 controller communicates with CN2 vRouters using BGP.
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B.
A CN2 controller communicates with CN2 vRouters using XMPP.
B.
A CN2 controller communicates with CN2 vRouters using XMPP.
Answers
C.
A CN2 controller communicates with other CN2 controllers using XMPP.
C.
A CN2 controller communicates with other CN2 controllers using XMPP.
Answers
D.
A CN2 controller communicates with other CN2 controllers using BGP.
D.
A CN2 controller communicates with other CN2 controllers using BGP.
Answers
Suggested answer: B, D

Explanation:

A CN2 controller communicates with CN2 vRouters using XMPP (Extensible Messaging and Presence Protocol) and with other CN2 controllers using BGP (Border Gateway Protocol). XMPP is used for control plane communication, while BGP is used for routing updates between controllers.

Click the Exhibit button.

Referring to the exhibit, what does port: 8080 represent?

A.
It is the port that is exposed to clients that are external to the cluster.
A.
It is the port that is exposed to clients that are external to the cluster.
Answers
B.
It is the port that is used by the external load balancer.
B.
It is the port that is used by the external load balancer.
Answers
C.
It is the port on which the webapp pod is listening.
C.
It is the port on which the webapp pod is listening.
Answers
D.
It is the port that is exposed to clients that are internal to the cluster.
D.
It is the port that is exposed to clients that are internal to the cluster.
Answers
Suggested answer: D

Explanation:

In the context of a Kubernetes service,port: 8080represents the port that is exposed to clients that are internal to the cluster45.This is the stable port the Service exposes inside the cluster --- other Pods in the cluster send traffic to this port4. Reference from Juniper site:Nigel Poulton,Baeldung

Click the Exhibit button.

Referring to the exhibit, which statement is correct?

A.
There are no projects.
A.
There are no projects.
Answers
B.
There are no services.
B.
There are no services.
Answers
C.
There are no compute nodes.
C.
There are no compute nodes.
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D.
There are no virtual machines.
D.
There are no virtual machines.
Answers
Suggested answer: D

Explanation:

The correct answer is D. There are no virtual machines. Referring to the exhibit, which shows the output of the openstack server list command, we can see that there are no rows in the table, which means that there are no servers (or virtual machines) in the OpenStack environment. The command openstack server list is used to list servers that you can access1. The other statements are incorrect, because the exhibit does not show any information about projects, services, or compute nodes. To list projects, you would use the command openstack project list2. To list services, you would use the command openstack service list2. To list compute nodes, you would use the command openstack compute service list3.

Which statement is true about containers?

A.
Containers perform abstraction at the physical layer.
A.
Containers perform abstraction at the physical layer.
Answers
B.
Containers perform abstraction at the application layer.
B.
Containers perform abstraction at the application layer.
Answers
C.
Containers share a copy of the host's operating system binaries.
C.
Containers share a copy of the host's operating system binaries.
Answers
D.
Containers are slower to boot than virtual machines.
D.
Containers are slower to boot than virtual machines.
Answers
Suggested answer: B

Explanation:

Containers perform abstraction at the application layer12.They are executable units of software in which application code is packaged along with its libraries and dependencies, in common ways so that the code can be run anywhere---whether it be on desktop, traditional IT or the cloud12.

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