You open a browser, type a website name, and — boom — the page loads. Under that simple moment is a small orchestra of parts doing very specific jobs. This article gives you the big picture in plain language, then shows you exactly how to prove it to yourself with quick hands-on steps. No memorizing jargon. No tables. Just a clean mental model you can actually use.
The big picture (in human words)
A network is simply devices talking to each other.
A LAN (Local Area Network) is the nearby chat: your home, office, classroom.
A WAN (Wide Area Network) is the long-distance chat: between buildings, cities, or countries, usually via an Internet provider.
The Internet is millions of networks connected together, all agreeing on common rules so your messages can travel anywhere.
If all traffic stays inside your home or office, that’s LAN. If it leaves your building and crosses providers, that’s WAN/Internet.
Who does what (roles you can picture)
Switch — the indoor mail sorter. It connects devices in one place and delivers local messages to the correct plug without…
Current MacOS versions do not natively include the `ip` command. It does have the ifconfig and netstat commands. You can also install a wrapper for `ip` from here: https://github.com/brona/iproute2mac
