Networking¶
Networking fundamentals frequently tested in systems and backend interviews.
| Topic | Key Focus |
|---|---|
| OSI Model | 7 layers, Protocols at each layer |
| TCP vs UDP | 3-way handshake, Flow control, Use cases |
| HTTP & HTTPS | HTTP/1.1 vs 2 vs 3, TLS, Status codes |
| DNS | Resolution flow, Records, Caching, TTL |
| REST vs gRPC | Protobuf, Streaming, When to use which |
| WebSockets | Full-duplex, Handshake, Use cases |