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Extended Berkeley Packet Filter (eBPF) maps are a sophisticated interface that allows atomic updates to shared memory segments. These segments act as shared memory and provide a robust interface for eBPF program configuration.

The read-copy update mechanism reduces the performance footprint on the hot path. eBPF allows exclusive access to memory fragments. It can handle various map types, including arrays, hash tables, bloom filters, and queues, making it ideal for complex configurations such as security. 

As configuration complexity increases, the need to connect different map entries increases. The ability to update configurations atomically will fail if too many connections exist. Updates to one map entry may require updating others simultaneously, leading to inconsistency.

Learn how to manage XDP/eBPF effectively for better DDoS protection in the guide linked below.