Networking

Network Resilience

Dec 12, 2025 3 min read

In an era of high-level abstractions, the fundamental protocols—TCP/IP, DNS, and HTTP/3—are often overlooked. Yet, understanding these is what separates a developer from an engineer. Resilience isn't just about having a backup server; it's about understanding how your application behaves under packet loss or high jitter.

HTTP/3 (QUIC) is a game changer, solving the head-of-line blocking problem that plagued HTTP/2. Implementing it correctly requires a deep dive into UDP-based communication and how it interacts with modern firewalls and load balancers.

Building for resilience means assuming the network will fail. Implementing robust retry strategies with exponential backoff, circuit breakers, and stateful offline-first capabilities is essential for modern enterprise-grade software.