Air signals and marine cables

Photo by Glenn Carstens-Peters on Unsplash

Browsing the Web

Let´s say you are currently behind your laptop and open the Google Chrome browser to search for something. Where do you go? To the homepage of GOOGLE, of course to search for a specific thing. Not very complicated, right.

Search something on Google

SEARCH REQUEST 1: ISP, DNS &IP

But how does this technically work? What happens when you open a browser on your laptop to search a URL? When you go to https://www.google.com and click on ENTER, you literally ask “Who is this?” Your questions goes to the Internet Service Provider (ISP), the organization you pay for to have internet. They get your request and send it the the Domain Name Servers (DNS), which is like a modern digital phone book, that contains a list of all available internet addresses (IP-addresses). They send an IP-address back to the Internet Service Provider and the website or the web browser receives this address. At this moment you just received an IP-address, a digital number to look up the website you are searching for. Nothing is yet visible in your webbrowser. So, now you know:

SEARCH REQUEST 2: WEB FILES

The webbrowser now sends of a second request to the specific servers of the IP-address. Servers are actually just computers connected to each other. They run a piece of software, so they know how to send you their files, when you request for them. So, it sends you the web files stored on their server:

A website consists of these main web files: HTML, CSS & Javascript.

The Internet backbone

Well interesting, everything on the internet is connected! That´s clear. But how is it connected? That is where the Internet backbone comes in. The what? No worries, we will get there:). Let´s talk about air signals and marine cables to explain how it works.

Air Signals & marine cables

When you are at home, at work or in a coffee shop, as long as there is WIFI, you can connect to the internet. WIFI gives us internet from the router.This router is connected to a modem, a box that allows the Internet Service Provider (ISP) to connect. So this modem has signal towers that transmit air signals (search requests) to the ISP, that is connected to the Internet Backbone, a magical blue cable lying deep inside the ocean.

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Diana Vilé

Diana Vilé

A passionate Digital Communication Professional from Barcelona, Spain. Experience: Content, UX-design, Frontend. https://dianavile.github.io/AllDigitalAgency/