What are the challenges in detecting Layer 7 DDoS attacks compared to volumetric attacks?

Detecting Layer 7 attacks is more challenging because the traffic often appears legitimate. Volumetric attacks are easy to spot due to the sheer volume of traffic. Layer 7 attacks blend in with normal traffic patterns, requiring deeper packet inspection and behavioral analysis to identify malicious requests. The lower traffic volume also means traditional network-based DDoS protection may not trigger.