Air Internet? The Truth Behind Your Connection

From the moment you wake up and check your phone, until you go to bed at night, the internet has become an indispensable part of our lives. Sending messages, listening to music, watching videos, working or studying online—everything depends on that invisible connection we take for granted. But have you ever stopped to think about how the internet actually reaches our hands? It’s a question many of us have asked ourselves, and today we’re going to unravel the mystery behind this everyday magic.

Demystifying the Connection: Is It Really Airborne?

It’s common to think that the internet reaches us wirelessly, floating through the air as if by magic. You might imagine invisible waves radiating from distant antennas to your device. This idea, while intuitive given the wireless nature of the Wi-Fi we use at home, is far from reality. While the last mile of the connection, from your router to your devices, is wireless, the vast majority of the internet travels along a much more tangible and surprising path.

The Underwater Network: Fiber Optic Highways Under the Sea

Prepare to be amazed: approximately 99% of global data traffic travels via submarine fiber optic cables ! Yes, you read that right, cables laid across the seafloor connecting entire continents. Imagine a vast network of digital highways, longer than any land-based road, stretching across the world’s oceans. These cables, as thin as a human hair but incredibly resilient, are the backbone of the modern internet.

These cables are not simple copper wires, but sophisticated fiber optic conduits. Optical fiber transmits information through pulses of light, enabling extremely fast and efficient data transfer speeds. These cables are deployed on the ocean floor by specialized ships that travel thousands of kilometers, carefully laying the cables and ensuring the connection between different points on the planet.

SAM-1: A Giant Submarine Connecting Latin America

An impressive example of this infrastructure is the SAM-1 (South America-1) cable. This fiber optic colossus stretches more than 25,000 kilometers underwater, connecting all of Latin America. It crosses seven countries, acting as a main artery through which enormous amounts of information flow. SAM-1 is not just another cable; it is the fifth longest connection cable in the world, demonstrating the magnitude of the global submarine network. In Colombia, this cable reaches through Barranquilla, from where the connection is distributed to different cities across the country.

How Does the Internet Really Work? The Network of Networks

The Internet is, at its core, a network of networks. It’s not a centralized entity, but rather a vast interconnection of computers and servers around the world. For this network to function, Internet Exchange Points (IXPs) are needed . IXPs are physical locations where different Internet networks connect to each other to exchange traffic locally. Think of them as key distribution nodes, where information is efficiently rerouted to reach its final destination. Thanks to IXPs, we can communicate with people and access information anywhere on the planet.

The Internet’s operation is based on standardized communication protocols, which allow different devices and networks to understand each other. These protocols define how data is sent, received, and processed. Information is divided into small packets that travel through the network, following different routes and reassembling at their destination. This decentralized, protocol-based architecture is what makes the Internet so robust and adaptable.

A Brief History of the Internet: From the Cold War to Everyday Life

The origins of the Internet date back to the Cold War. In the 1960s, the United States Department of Defense was searching for a decentralized form of communication that could withstand a nuclear attack. Thus, ARPANET (Advanced Research Projects Agency Network) was born, considered the precursor to the Internet. Initially, ARPANET connected universities and research centers, enabling the exchange of information between scientists and academics.

Over the following decades, ARPANET evolved and expanded, adopting the TCP/IP protocol, fundamental to the modern internet. In the 1990s, with Tim Berners-Lee’s invention of the World Wide Web, the internet was opened to the general public, transforming into the global tool we know today. What began as a military project became the most important communications infrastructure in history.

Deploying the Connection: Ships, Robots, and Bunkers

The installation and maintenance of submarine cables is a complex and fascinating task. Specialized cable-laying vessels sail the oceans, equipped with cutting-edge technology, to deploy cables on the seabed. In deep waters, cables are laid directly on the ocean floor. In coastal areas, where depths decrease and there is a risk of damage from anchors or marine activities, underwater robots are used to bury the cables and protect them.

Once the cable reaches land, it connects to an IXP, often located in a fortified building or bunker. These IXPs are network hubs, equipped with a multitude of servers and connection equipment. From the IXPs, the connection is distributed to terrestrial networks, ultimately reaching our homes and devices.

The Internet in Colombia: A Path to Connection

In Colombia, the history of the Internet began in the late 1980s. The Universidad de los Andes pioneered the search for connectivity, with the initial goal of facilitating the exchange of academic information with other institutions worldwide. In 1991, the university successfully established the first information network , using existing telephone lines as the initial infrastructure.

Similar to the early days of the Internet in the United States, Colombia took advantage of the telephone infrastructure to create its first network. This initial phase allowed universities, researchers, and government entities to exchange data , initially connecting with the U.S. university network. From there, the network expanded, evolving thanks to technology and the investment of companies like Telefónica, which have brought the latest connectivity technologies to Colombia , enabling Internet speeds that were unthinkable a few decades ago.

Conclusion: Beyond Magic, Real Infrastructure

The next time you use the Internet, remember that behind the apparent wireless magic lies a complex physical infrastructure: submarine cables that cross oceans, IXPs that distribute traffic, and a history of innovation and global collaboration. The Internet is not something ethereal, but a tangible human creation, built with engineering and foresight. Understanding how the Internet works gives us an even greater appreciation for this powerful tool that has transformed our lives.

Frequently Asked Questions (FAQ) about Internet Connection

Is it true that the Internet comes through the air?

No, most internet travels through undersea fiber optic cables. Wireless connection (Wi-Fi, mobile data) is just the last part of the journey, from your router or cell tower to your devices.

What are submarine fiber optic cables?

These are special cables designed to be installed on the seabed. They contain fine glass or plastic fibers that transmit data via high-speed light pulses.

What are IXPs (Internet Exchange Points)?

They are physical locations where different Internet networks connect to exchange traffic with each other, improving efficiency and reducing connection latency .

How are submarine cables installed?

Specialized vessels called cable laying vessels are used to deploy the cables on the seabed. In shallow areas, robots are used to bury and protect the cables.

How fast does data travel over fiber optics?

Light in optical fiber travels at approximately 200,000 kilometers per second, close to the speed of light in a vacuum. This allows for extremely fast data transmission.

What would happen if all the submarine cables were cut?

It would be a catastrophe for global communications. Most of the internet would go down, disrupting the economy, communications, and many aspects of modern life. Fortunately, there are multiple cables and redundant routes to minimize the risk of massive disruptions.

Is it expensive to install and maintain submarine cables?

Yes, it’s a very expensive investment. Manufacturing, deploying, and maintaining these cables requires specialized technology and very expensive ships. However, the capacity they offer for global communication is incalculable.