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CheckPoint 156-315.81 Exam - Topic 9 Question 78 Discussion

What is the limitation of employing Sticky Decision Function?
B) Acceleration technologies, such as SecureXL and CoreXL are disabled when activating SDF
A) With SDF enabled, the involved VPN Gateways only supports IKEv1
C) With SDF enabled, only ClusterXL in legacy mode is supported
D) With SDF enabled, you can only have three Sync interfaces at most

CheckPoint 156-315.81 Exam - Topic 9 Question 78 Discussion

Actual exam question for CheckPoint's 156-315.81 exam
Question #: 78
Topic #: 9
[All 156-315.81 Questions]

What is the limitation of employing Sticky Decision Function?

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Suggested Answer: B

Sticky Decision Function (SDF) is a feature that ensures that VPN traffic is handled by the same core on a Security Gateway with multiple CPU cores. This improves the performance and stability of VPN tunnels by avoiding out-of-order packets and reducing encryption overhead. However, the limitation of employing SDF is that acceleration technologies, such as SecureXL and CoreXL are disabled when activating SDF. This means that SDF may reduce the overall throughput and scalability of the Security Gateway. Therefore, SDF should be used only when necessary and only on gateways that are dedicated to VPN traffic. Reference:R81 Performance Tuning Administration Guide


by Kimberely at May 13, 2026, 08:45 AM

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Ronnie
21 hours ago
IKEv1 only? That's a bummer.
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Bulah
6 days ago
I thought SDF was supposed to improve performance, not restrict it.
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Gianna
11 days ago
ClusterXL in legacy mode? That's outdated!
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Galen
16 days ago
Wait, only three Sync interfaces? That seems really limiting.
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Rikki
22 days ago
Totally agree, disabling SecureXL is a huge drawback!
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Cammy
27 days ago
IKEv1 only? That's a bummer.
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Dell
1 month ago
I vaguely remember something about sync interfaces being limited with SDF, but I can't remember if it was three or four.
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Edgar
1 month ago
I'm a bit confused about the ClusterXL modes. I think SDF might only support legacy mode, but I can't recall the details.
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Candra
1 month ago
I feel like I saw a practice question about SDF and acceleration technologies being disabled. Could that be option B?
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Dottie
3 months ago
I think I remember something about SDF and its limitations, but I'm not entirely sure if it's related to IKEv1 support.
upvoted 0 times
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