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Juniper JN0-420 Exam Practice Questions (P. 1)

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Question #1
Which command is valid for accessing a Junos device using the RESTful API on the default port?
  1. A
    curl http://192.168.1.1/rpc/get-interface-information?interface-name=1o0 –u "user:pass123"
  2. B
    curl http://user:[email protected]/rpc/get-interface-information?interface-name=1o0
  3. C
    curl –u "user:pass123" http://192.168.1.1:80/rpc/get-interface-information?interface-name=1o0
  4. D
    curl http://user:[email protected].:3000/rpc/get-interface-information?interface-name=1o0

Correct Answer:
C
Reference: https://www.juniper.net/documentation/en_US/junos/topics/task/configuration/rest-api-submitting-post-request.html

Question #2
You need to reset all Junos systems in your lab to their factory-default state and then push a new configuration to the device.
Which two Ansible modules would your playbook use to accomplish this task? (Choose two)
  1. A
    junos_system_services
  2. B
    junos_zeroize
  3. C
    junos_get_facts
  4. D
    junos_install_config

Correct Answer:
BD
References:
https://www.juniper.net/documentation/en_US/junos-ansible1.0/topics/example/junos-ansible-playbooks-device-zeroize.html https://www.juniper.net/documentation/en_US/junos-ansible1.0/topics/example/junos-ansible-playbooks-device-configuring.html

Question #3
Click the Exhibit button.
Exhibit:
Ansible playbook:

The r0 device is currently in a factory-default state. The console connection of r0 is reachable using Telnet on TCP port 555 of the console_server host.
Referring to the exhibit, which statement is true?
  1. A
    The device does not require configuration changes for the playbook to run successfully
  2. B
    The Telnet service must be configured for the playbook to run successfully
  3. C
    A password for the root user must be configured for the playbook to run successfully
  4. D
    The NETCONF service must be configured for the playbook to run successfully

Correct Answer:
D
Reference: http://docs.ansible.com/ansible/latest/junos_facts_module.html

Question #4
Click the Exhibit button.
Exhibit:

You are using RubyEZ to interact with a Junos device: however, you are not successfully connecting to the device.
Referring to the exhibit, what is the problem?
  1. A
    Argument passed to Netconf:: SSH.new statement must be referenced as variables
  2. B
    Netconf::SSH.new statement only expects an IP address of the target device
  3. C
    Netconf::SSH.new statement arguments must be hashes
  4. D
    A Junos::Ez::Provider statement is missing before the Netconf::SSH. New statement

Correct Answer:
A

Question #5
Click the Exhibit button.
Exhibit:

How would you test the configuration snippet shown in the exhibit?
  1. A
    Use the root@router% logger SSHD_LOGIN_FAILED command
  2. B
    Use the root@router% logger -e SSHD_LOGIN_FAILED command
  3. C
    Use the root@router% test SSHD_LOGIN_FAILED command
  4. D
    Use the root@router% event SSHD_LOGIN_FAILED command

Correct Answer:
B

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