Cyberlium on Android·Google Play Store

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Sockets on Localhost

Tiny socket demos bound to 127.0.0.1 only.

TCP Mental Model

Connect vs listen.

15 min

+20 XP

Bind to Loopback

Never 0.0.0.0 for beginner labs.

15 min

+20 XP

Error Handling

Connection refused is normal.

15 min

+20 XP

Lab: Localhost Port Check

connect_ex to 127.0.0.1 ports.

25 min

+20 XP

Quiz — Sockets Scope

Localhost-only ethics check.

10 min

+20 XP