JNCIA-SEC Junos OS Security Objects Practice Question

Which TWO characteristics apply to custom applications created in Junos OS? (Choose two)

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

Custom applications can include inactivity timeout settings.

Custom applications allow specifying protocol, source ports, and destination ports for policy matching.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✓
Custom applications can include inactivity timeout settings.
Why this is correct
Custom applications support configuring custom session inactivity timeouts.
✗
Custom applications automatically generate Application Layer Gateways for proprietary protocols without manual configuration.
Why it's wrong here
Custom apps do not auto-generate ALGs.
✓
Custom applications can define specific IP protocols (TCP, UDP, etc.) and destination port ranges.
Why this is correct
Custom applications define protocol and port parameters.
✗
Custom applications are restricted to global policies only and cannot be used in zone-to-zone policies.
Why it's wrong here
Custom applications can be used in any security policy.
✗
Custom applications can overwrite built-in predefined Junos applications if named identically.
Why it's wrong here
Predefined applications cannot be overwritten; name collisions cause commit errors.

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Written and reviewed by Johnson Ajibi, MSc IT Security

Senior Network & Security Engineer · founder of Courseiva

Last reviewed August 2026 · checked against the official Juniper Networks exam blueprint

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