Networking¶
Distributed systems are just programs talking over networks, so every outage, slow request, and "works on my machine" eventually comes back to networking. This chapter builds a complete, debuggable model: the layered stack, IP addressing and subnets, TCP and UDP with their handshakes and failure modes, ports and sockets, DNS end to end, HTTP/HTTP2/HTTP3, TLS handshakes and certificates, NAT, load balancing (L4 vs L7), proxies and service meshes, and the mathematics of latency, throughput, and capacity you use to size systems. …
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