The OSI Model

Layers	Name	Mediator	Example
1	Physical	Bits, waves	Cables, wifi signal
2	Data Link	Frames	Ethernet, wifi
3	Network	Packets	Routers, IP address
4	Transport	Datagrams	UDP/TCP
5	Session	Data	RPCs
6	Presentation	Data	Encryption, encoding
7	Application	Data	HTTP, SSH