PCNSE Practice Question: Managing Troubleshooting and High Availability
An engineer is configuring HA on a pair of firewalls and wants to ensure that the HA1 link is secure and redundant. Which two actions should the engineer take? (Choose two.)
⚠ Common exam trap
It's easy for candidates to confuse HA1 and HA2 features; HA2 encryption and aggregation are not applicable to HA1 security and redundancy.
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
✓
Configure HA1 backup on a separate interface.
To secure HA1, enable HA1 encryption. To provide redundancy, configure HA1 backup on a separate interface. These two actions ensure that the control link is both protected and resilient.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Configure HA1 backup on a separate interface.
Why this is correct
HA1 backup provides redundancy for the control link. If the primary HA1 link fails, the backup link is used. This ensures that the HA pair remains operational and can still exchange heartbeats and synchronize configuration. It is a recommended practice for high availability.
- ✗
Enable HA1 link aggregation using LACP.
Why it's wrong here
HA1 does not support link aggregation with LACP. HA1 is a control link and is typically configured on a single interface with an optional backup. LACP is used for data plane link aggregation, not for HA1. This action is not valid.
- ✗
Set the HA1 link to use UDP port 29281.
Why it's wrong here
HA1 uses UDP port 29281 for heartbeats by default, but configuring the port is not an action for security or redundancy. The port is fixed and should not be changed. This option is a distractor because it mentions a correct default port but does not enhance security or redundancy.
- ✗
Configure HA2 encryption.
Why it's wrong here
HA2 encryption is used for session synchronization traffic, not for HA1. While it is a security best practice, the question asks for HA1 security and redundancy. HA2 encryption does not affect HA1. Therefore, this action is not relevant to the requirement.
- ✓
Configure HA1 encryption.
Why this is correct
HA1 encryption encrypts the control traffic between HA peers, including heartbeats and configuration synchronization. This prevents eavesdropping and tampering. It is a security best practice. The firewall supports HA1 encryption with a pre-shared key. Enabling it ensures that sensitive information exchanged over HA1 is protected.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Palo Alto Networks exam blueprint
This PCNSE practice question is part of Courseiva's free Palo Alto Networks certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PCNSE exam.