A large enterprise is deciding between using Junos event scripts or an external SNMP-based monitoring system to handle automated responses to network events. The network has intermittent connectivity to the management network. Which factor most strongly favors the use of event scripts?

Event scripts run locally on the device and can execute actions even when the management network is unreachable.

Event scripts are easier to write than configuring an SNMP-based system.

Event scripts can be used to configure the device, while SNMP can only monitor.

Event scripts are automatically backed up to a central server.

An event script is written to react to a 'SNMP_TRAP_LINK_DOWN' event. The script needs to log the interface name and the system hostname to a file. Which approach correctly obtains this information inside the script?

Parse the syslog message from the /var/log/messages file to extract the interface name and hostname.

Use the predefined environment variables $interface_name and $hostname, which are populated by eventd when the script is triggered.

Hard-code the interface name and hostname in the script, as the script is only used for one specific interface.

Execute the CLI command 'show interfaces terse' and parse the output to find the interface that changed state.

What is a security best practice when deploying event scripts on a Junos device?

Set restrictive file permissions on the script file

Store the script in a world-writable directory

Disable all logging for the script

Allow all users to execute the script

Why is it important to validate input in an event script?

To prevent injection attacks or unexpected behavior

To reduce the script's file size

To avoid using environment variables

Juniper NetworksCertified Specialist, Automation and DevOps (JNCIS-DevOps)

Domain 4Objective 3

Event Scripts JN0-423 Practice Questions (Page 4)

Part of the Junos Automation Scripts domain, which makes up ~19% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~7–11 in this domain), expect 2–3 from this objective — we provide 29 practice questions to prepare you well beyond it. (estimate)

29questions here

6free pages

9concepts

Questions 16–20

16application · medium
An event script needs to log the username of the user who initiated a commit, along with the event name. Which environment variable provides the username?
Select an answer first
17expert · hard
A large enterprise is deciding between using Junos event scripts or an external SNMP-based monitoring system to handle automated responses to network events. The network has intermittent connectivity to the management network. Which factor most strongly favors the use of event scripts?
Select an answer first
18application · medium
An event script is written to react to a 'SNMP_TRAP_LINK_DOWN' event. The script needs to log the interface name and the system hostname to a file. Which approach correctly obtains this information inside the script?
Select an answer first
19foundation · easy
What is a security best practice when deploying event scripts on a Junos device?
Select an answer first
20foundation · easy
Why is it important to validate input in an event script?
Select an answer first

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