Labs/Networking

Networking

Addresses, ports, names and TLS - the four things between a browser and your app, on a real Linux machine.

1. IP addresses and CIDRRead a CIDR block, count its addresses, build its mask and spot overlaps. · 15 min · beginner
2. Ports and socketsStart a listener, see it with ss, bind it two ways and learn what "refused" means. · 15 min · beginner
3. From a name to a web pageFollow one request from a name to an IP, a port, a Host header and a TLS handshake. · 20 min · intermediate