What is Networking?

Nodes vs links: devices or their connections.

Types of networks: peer to peer or client server

Protocols: tcp/IP, HTTP, SMTP, etc

Tcp vs udp

Lan vs wan

Private vs public up

Data transmission

Hubs, switches and routers

Ports: software-based channels that allow multiple services to exist on one computer.  These ports are also often reserved for specific protocols, such as HTTP, HTTPS, SSH and DNS.