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Juniper JN0-420 Exam Practice Questions (P. 4)

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Question #16
What are three ways for PyEZ to connect to supported Junos devices? (Choose three)
  1. A
    NETCONF over SSH
  2. B
    serial interface
  3. C
    Telnet
  4. D
    JET API
  5. E
    Webhook

Correct Answer:
ABC
Reference: https://www.juniper.net/documentation/en_US/junos-pyez/topics/task/program/junos-pyez-connection-methods.html

Question #17
Click the Exhibit button.
Exhibit:



Referring to the exhibit, what is the type of the myConfig variable on line 17 of the Python script?
  1. A
    template
  2. B
    dictionary
  3. C
    string
  4. D
    list

Correct Answer:
A
Reference: https://www.juniper.net/documentation/en_US/cso3.1/topics/task/operational/cd-config-template-working-config-designing.html

Question #18
The <rpc-reply> XML tag is a member of which NETCONF protocol layer?
  1. A
    Transport
  2. B
    Content
  3. C
    Messages
  4. D
    Operations

Correct Answer:
A
The NETCONF protocol uses an RPC-based communication model. NETCONF peers use <rpc> and <rpc-reply> elements to provide transport-protocol- independent framing of NETCONF requests and responses.
Reference: https://tools.ietf.org/html/rfc6241

Question #19
Click the Exhibit button.
Exhibit:

The Ansible playbook shown in the exhibit is executed against a set of Junos network devices. Each Junos device is configured with a user account in the login class. The user account uses SSH-key-based authentication with a passphrase of user123. super-user
What is the result of executing this playbook against the Junos network devices?
  1. A
    The playbook executes, but fails with a "ConnectAuthError" due to the missing passphrase argument to the junos_get_facts module
  2. B
    The playbook fails due to a YAML syntax error.
  3. C
    The playbook executes and prints the version of Junos running on each network device as the value of response.facts.version
  4. D
    The playbook executes and prints "VARIABLE IS NOT DEFINED!" as the value response.facts.version

Correct Answer:
C

Question #20
Which statement is true about a Junos ephemeral configuration database?
  1. A
    It can be used to trigger a commit script
  2. B
    It can be used to reduce commit time
  3. C
    It can be used to archive previous versions of the ephemeral configuration
  4. D
    It can be used to validate configuration data semantics

Correct Answer:
B
Reference: https://www.juniper.net/documentation/en_US/junos/topics/concept/ephemeral-configuration-database-overview.html

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