PCNSE Manage, Monitor and Operate Practice Question
A company wants to forward logs from a firewall to a SIEM system with high reliability. Which log forwarding method ensures that logs are not lost if the SIEM is temporarily unreachable?
⚠ Common exam trap
Candidates often assume Syslog over TCP alone guarantees delivery, but without buffering enabled in the log forwarding profile, the firewall will drop logs if the TCP connection fails, making buffering the key differentiator for reliability.
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
✓
Syslog over TCP with buffering enabled in the log forwarding profile.
Syslog over TCP with buffering enabled in the log forwarding profile ensures reliable delivery because TCP provides acknowledgment and retransmission of lost segments, while the buffering mechanism stores logs locally on the firewall when the SIEM is unreachable and retransmits them once connectivity is restored. This combination prevents log loss during temporary network or SIEM outages.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Email (SMTP) for each log.
Why it's wrong here
Email is not suitable for high-volume log forwarding.
- ✓
Syslog over TCP with buffering enabled in the log forwarding profile.
Why this is correct
TCP provides reliable delivery, and buffering prevents loss during downtime.
- ✗
Syslog over UDP with a log forwarding profile.
Why it's wrong here
UDP is unreliable and logs may be lost.
- ✗
Syslog over SSL without optional buffering.
Why it's wrong here
SSL provides encryption but without buffering, logs may be lost if connection fails.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.