Core Concepts

What is the internet

How does the internet work?

Servers & Clients

Protocols

Loosely defined, protocols are rules for communication between computers. Quite a few work together to make the internet do its thing.

• Email protocols (SMTP / POP / IMAP)
• HTTP(S)
• FTP
• TCP/IP
• IP & IPv6

TLDs

-Top Level Domains- .com, .org, .net, .io, and on and on, are all examples of TLDs. More and more TLDs are coming into existence all the time, like .xxx, .book, .kitchen (no, seriously). List of TLDs

DNS

Domain name system: A system for translationg domain names (TLDs!) into IP addresses.

URLs

http://www.example.com/stuff/index.html

Five parts:

1. protocol (http)
2. server name / subdomain (www)
3. domain name (example.com)
4. folder name (stuff)
5. file name (index.html)

You'll sometimes see the domain name followed by a colon and series of numbers, like so

http://localhost:1337

That's called a port number.

They're like PO boxes for your computer, making sure your request gets delivered to the right application. More on those later.

Browsers

See Google's blogspot post

See also WhatBrowser.org

Web Development

Front End and Back End

TeamTreeHouse has a great writeup on the Front vs Back jargon.

HTML, CSS, JS

How do they all work together