156-315.81.20 Performance Tuning (SecureXL/CoreXL) Practice Question
An administrator is analyzing the performance of a Security Gateway with CoreXL and SecureXL enabled. The administrator notices that certain types of traffic, such as VoIP and streaming media, are not being accelerated by SecureXL. Which of the following is the most likely reason for this behavior?
⚠ Common exam trap
The trap here is assuming SecureXL cannot handle UDP at all, when in fact it can, but not when deep inspection is required.
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
✓
The traffic requires deep packet inspection by the firewall.
Traffic that requires deep packet inspection, such as VoIP and streaming media subject to IPS or application control, cannot be accelerated by SecureXL. These advanced security features require full firewall processing, so SecureXL bypasses them. This is a common reason for selective non-acceleration, as SecureXL is designed to offload only simple, stateless packet handling.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The traffic requires deep packet inspection by the firewall.
Why this is correct
SecureXL cannot accelerate traffic that requires deep packet inspection (DPI) or advanced security features like IPS, application control, or antivirus. VoIP and streaming media often need such inspection to detect threats or enforce policies. When a rule includes these blades, the traffic is passed to the Firewall path for full processing, bypassing SecureXL. This is the most likely reason for non-acceleration.
- ✗
The SecureXL templates for UDP are disabled by default.
Why it's wrong here
SecureXL templates for UDP are not disabled by default; they are enabled and cover common UDP services. If templates were disabled globally, all traffic would be affected, not just VoIP and streaming. The selective non-acceleration suggests a per-connection reason, such as deep inspection, rather than a global template issue.
- ✗
CoreXL is not configured to handle UDP traffic.
Why it's wrong here
CoreXL distributes all traffic, including UDP, across multiple cores. There is no configuration that excludes UDP from CoreXL. The lack of acceleration is not due to CoreXL; it is due to SecureXL limitations. CoreXL and SecureXL work together, but CoreXL does not decide which traffic is accelerated.
- ✗
SecureXL does not accelerate UDP traffic.
Why it's wrong here
SecureXL does accelerate UDP traffic, including VoIP and streaming media, provided the traffic matches supported templates and does not require deep inspection. Saying it does not accelerate UDP is incorrect; many UDP-based services are accelerated. The issue is more likely due to protocol-specific handling or policy actions that prevent acceleration.
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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 Check Point exam blueprint
This 156-315.81.20 practice question is part of Courseiva's free Check Point 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 156-315.81.20 exam.