TCP/IP — A Five-Minute Overview
by Sherif Asker
A self-running tour of the four layers of the TCP/IP model. The terminal on the right plays a 90-second demo automatically — just read along and watch real Linux commands explore each layer.

A self-running tour of the four layers of the TCP/IP model. The terminal on the right plays a 90-second demo automatically — just read along and watch real Linux commands explore each layer.

A mystery service is running on this VM. Find which TCP port it is listening on and write the port number to /tmp/answer.