Networking Fundamentals
Step 8 in the System Design path · 7 concepts · 0 problems
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📘 Learn Networking Fundamentals from zero
A from-first-principles walkthrough that assumes no prior knowledge (generated in the enrichment pass, grounded in the source lessons).
Lessons in this topic
- ○The Layered Network Model — OSI, TCP/IP, and L4 vs L7
- ○IP Addressing, Subnets & CIDR
- ○TCP Deep — Handshake Cost, Congestion Control & Head-of-Line Blocking
- ○hard Bandwidth-Delay Product & Why a Fast Link Feels Slow
- ○hard TCP Incast: Congestion Collapse Under Fan-In
- ○hard Subnetting & CIDR: usable addresses and the overlap trap
- ○Networking at Scale — NAT Exhaustion, L4-vs-L7-vs-DSR, QUIC Limits, MTU/PMTUD & CIDR (Deep Dive)