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101 · Question #369

101 Question #369: Real Exam Question with Answer & Explanation

The correct answer is A: Monitoring for a threshold of increased number of transactions per second per URL.. F5 ASM detects Layer 7 DoS attacks by tracking both absolute thresholds and relative percentage changes in transactions per second and server latency, providing four distinct detection vectors.

Question

ASM can detect Layer 7 DoS attacks by which four ways of monitoring: (Choose four.)

Options

  • AMonitoring for a threshold of increased number of transactions per second per URL.
  • BMonitoring for a % change in transactions per second per URL.
  • CMonitoring for a % change in server latency or TPS.
  • DMonitoring for a threshold of increased server latency or TPS.
  • EMonitoring ASM policy builder performance.
  • FMonitoring BIG-IP CPU utilization.
  • GDeep Packet inspection.

Explanation

F5 ASM detects Layer 7 DoS attacks by tracking both absolute thresholds and relative percentage changes in transactions per second and server latency, providing four distinct detection vectors.

Common mistakes.

  • E. ASM Policy Builder monitors traffic to build security policies automatically, not to detect real-time DoS conditions.
  • F. BIG-IP CPU utilization is a system health metric, not a Layer 7 application-level DoS detection mechanism within ASM.
  • G. Deep Packet Inspection is a general network technique not used by ASM as one of its four defined Layer 7 DoS detection methods.

Concept tested. F5 ASM Layer 7 DoS detection methods

Reference. https://techdocs.f5.com/en-us/bigip-15-1-0/big-ip-asm-implementations/detecting-and-preventing-dos-attacks.html

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