8:07OSI Model
Ping Works, Names Don't: DNS and the Application Layer | OSI Layer 7
The storefront, the mail room and the Yellow Pages, where every conversation begins.
8:07 Watch
IT lessons you can actually picture.
Networking lessons to help absorb data networking in "byte" sizes, taught in Byte City by Professor Flows.
How a lesson works
The question
A real outage. A question worth answering.
Byte City
Step inside the city and see how it works.
The real thing
A real terminal or screen you can use on Monday.
Frames from the lesson Hub, Switch, Router.
Start here
Your next stop in the city starts here.
8:07
8:11OSI Model
"Your Connection Is Not Private": TLS and Encoding | OSI Layer 6
The packing room: the label printer, the vacuum sealer and the lock on door 443.
8:11 Watch
8:17OSI Model
Why VoIP Calls Drop at 32 Seconds: The Session Layer | OSI Layer 5
The delivery window, and the phone call that hangs up at thirty-two seconds.
8:17 Watch
9:32OSI Model
Ping Works, Page Won't Load: Ports, TCP and UDP | OSI Layer 4
Numbered doors, the truck that calls ahead and the bullhorn that doesn't.
9:32 Watch
