# What technology does Cilium use at its core?

Cilium, Easy (Beginner), Architecture. https://k8wiz.com/uquiz/what-technology-does-cilium-use-at-its-core

- A. iptables
- B. eBPF
- C. IPVS
- D. OpenFlow

**Answer:** eBPF

**Explanation:** Cilium uses eBPF (extended Berkeley Packet Filter) technology at its core. eBPF allows programs to run in the Linux kernel without changing kernel source code or loading kernel modules, providing high-performance networking, observability, and security capabilities.