Network issues cause most production incidents. Services can't connect to databases. Requests time out. Latency spikes without obvious cause.
SRE interviews test your ability to understand and debug network problems. You need to explain protocols, use debugging tools, and reason about what happens when packets traverse the network.
I'll cover TCP/IP fundamentals, DNS, HTTP/TLS, load balancing, and the debugging tools you'll use in interviews and on the job. You'll learn to answer "why can't service A connect to service B?" systematically.