Juniper Juniper Certifications JN0-420 Questions & Answers

• Question 31:

  Click the Exhibit button. Exhibit:

  

  You are validating access to a Junos device using NETCONF and receive the response shown below.

  

  Referring to the exhibit, how would you solve this issue?

  A. Enable traceoptions under the NETCONF configuration hierarchy

  B. Enable protocol-version v1 under the SSH configuration hierarchy

  C. Enable outbound-ssh with services netconf under the SSH configuration hierarchy

  D. Enable ssh under the NETCONF configuration hierarchy

  Correct Answer: C

  Reference: https://www.juniper.net/documentation/en_US/junos/topics/topic-map/netconf-sshconnection.html

• Question 32:

  What are two message types that compose the message layer of the Juniper NETCONF implementation? (Choose two?)

  A.

  B.

  C.

  D.

  Correct Answer: CD

• Question 33:

  What is purpose of RubyEZ?

  A. to provide a Ruby framework for interfacing with Juniper devices

  B. to provide an off device interface to Ruby

  C. to provide a Ruby interface to Juniper devices that support Puppet

  D. to provide a Ruby interface to the Junos Space management product

  Correct Answer: D

• Question 34:

  Click the Exhibit button. Exhibit:

  

  Your manager asks you to troubleshoot an Ansible problem when logging into a Junos device. You notice

  the Ansible play in question has a vars_files argument that calls the variables.yml entry file. The contents

  of that file are displayed in the exhibit.

  What is happening in this scenario?

  A. The file is an SSH key

  B. The variables.yml file is not actually a YAML file

  C. The file is encrypted with ansible-vault

  D. The file is encrypted with ansible

  Correct Answer: C

  Reference: https://www.juniper.net/documentation/en_US/junos-ansible1.0/topics/task/configuration/junosansible-authenticating-users.html

• Question 35:

  What is a valid method for determining the Junos RPC associated with the show version command?

  

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: D

• Question 36:

  What are three types of Juniper on-box scripts? (Choose three)

  A. operational

  B. expect

  C. Ansible

  D. event

  E. commit

  Correct Answer: ADE

  Reference: "Network-Embedded Management and Applications" section 6.2.1

• Question 37:

  Which messaging protocol do JET service APIs use to interface with the Junos OS?

  A. NETCONF

  B. MQTT

  C. RabbitMQ

  D. gRPC

  Correct Answer: B

  Reference: https://www.juniper.net/documentation/en_US/jet1.0/information-products/pathway-pages/jetdeveloper-guide.html

• Question 38:

  Which transport protocol must be supported by RFC-compliant NETCONF implementations?

  A. TLS

  B. Telnet

  C. BEEP

  D. SSH

  Correct Answer: D

  The NETCONF protocol uses a simple remote procedure call (RPC) layer running over secure transports to facilitate communication between a client and a server. The Secure Shell (SSH) [6] is the mandatory secure transport that all NETCONF clients and servers are required to implement as a means of promoting interoperability. Reference: https://link.springer.com/content/pdf/10.1007/978-3-642-02627-0_7.pdf

• Question 39:

  You are asked to write an application that interacts directly with the internal APIs belonging to rpd. Which statement is true in this scenario?

  A. You must write the application using the XML APIs

  B. You must write the application using the REST APIs

  C. You must write the application using the JET APIs

  D. You must write the application using the YANG APIs

  Correct Answer: C

• Question 40:

  You want to push a configuration onto a Junos device without using NETCONF. Which two will accomplish this task? (Choose two)

  A. ZTP

  B. Ansible

  C. JET

  D. JSNAPy

  Correct Answer: AC