CloudFlare "Interview Questions"

This post contributes to the understanding of Cloudflare's deep engagement with low-level network protocols (TCP/IP stack, IPv4/IPv6, UDP, ICMP) by sharing interview questions. It reveals that Cloudflare engineers are expected to have a comprehensive understanding of these protocols, which is crucial for developing and maintaining their automatic attack mitigation systems. The post touches upon various aspects of network communication, including packet structure, flags, fragmentation, congestion control, and Linux-specific network configurations.