What is a URL?
It's the text in the bar at the top of your browser.
Every web page, image or resource of any kind on the Internet has a URL.
It's like a postal address - it's the unique location of something on the Internet.
How do I visit the URL?
The most popular way is just clicking a link in a web page.
Every time you tap or click a link, you visit a new URL.
You can also type it into the address bar.
What's in a URL?
1. Scheme or protocol
If a URL is a postal address, the scheme is your mode of transport.
|http||Web page||Make a request to show the page|
|https||Secure web page||Make a request to show the page|
|ftp||File transfer||Login to the FTP server to download the file|
|mailto||Open up your email client|
|file||Local file||Load the file from your local machine|
2. Host or domain
Which domain the request is for.
If a URL is a postal address, the domain is the town. They split the internet up into general areas.
Usually a single web server handles a single domain.
If a URL is a postal address, the path is the street and house number.
It's the specific area of the domain that we want to go to.
If a URL is a postal address, the query is you ringing on the doorbell and asking a question.
Many times, a query string isn't needed. You just visit a URL and it'll show you a page.
But sometimes you need to ask the web page a question and it gives you back an answer.
Searching Google is a great example: the query string contains the question you're asking.