What Is the Internet and How Does Data Travel to Your Device?

The internet powers nearly everything we do: streaming, texting, video calls, gaming, shopping, banking, and working from anywhere. It feels effortless. You tap a link, and a page appears. But behind that tap is one of the largest machines humans have ever built.

Today, an estimated 6 billion people, about three-quarters of the world’s population, use the internet. Their messages, photos, and videos cross more than 1.5 million kilometers of undersea cable, pass through thousands of data centers, and arrive on phones and laptops in the blink of an eye.

At Victra, the largest Verizon Authorized Retailer with nearly 1,500 locations across the United States, we believe understanding technology helps you use it with confidence. This guide is part of our Victra Teaches Tech series.

In this guide, you will learn what the internet really is, the building blocks that make it work, how data finds its way to your device step by step, how Wi-Fi and 5G connect you, what affects your speed, and how your data stays secure.

The Internet in 2026 by the Numbers

What Is the Internet?

The internet is a global system of interconnected computer networks that communicate using shared, standardized rules called protocols. The name itself describes the idea: interconnected networks.

A network is simply a group of connected devices that can exchange data, such as the phones, laptops, and smart TVs in your home. The internet links millions of these networks together: home networks, business networks, university networks, mobile carrier networks, and the massive networks run by cloud and streaming companies.

The internet is not one place, one computer, or one cable. It is made up of:

• Devices such as phones, computers, tablets, and smart home gadgets
• Servers that store websites, apps, videos, and files
• Data centers that house thousands of servers
• Routers and switches that direct traffic
• Fiber optic and copper cables on land and under the sea
• Wireless links such as Wi-Fi, cell towers, and satellites

The internet grew out of ARPANET, a U.S. research network that sent its first message in 1969. Today it carries everything from text messages to 4K movies.

Internet vs the Web vs Wi-Fi

These three terms are often used interchangeably, but they mean different things.

Email, video calls, online gaming, and app traffic also use the internet without being part of the web. And when your phone uses 5G instead of Wi-Fi, it reaches the same internet through a different on-ramp. For a closer look at the two, read our guide to Wi-Fi vs. cellular data.

Who Runs the Internet?

No single organization owns or controls the internet. Instead, responsibility is shared:

Because everyone uses the same open standards, any device that “speaks” the right protocols can join the internet.

The Building Blocks of the Internet

Servers and Data Centers

A server is a powerful computer that stores websites, apps, videos, and other digital content and sends that information when a device requests it. Every app on your smartphone communicates with servers somewhere in the world.

Large companies house thousands of servers in data centers, secure buildings with redundant power, cooling, and network connections. Data centers power streaming platforms, social media, online shopping, banking apps, AI tools, and cloud storage.

Routers, Switches, and ISPs

Your home router links your devices to your provider’s network, and much larger routers across the internet pass data from network to network. To learn what your home router actually does, see our guide on how routers work.

The Backbone, Exchange Points, and Undersea Cables

The internet backbone is made up of very high-capacity fiber optic lines that connect major cities, data centers, and networks. Networks meet and swap traffic at internet exchange points (IXPs) and through private agreements called peering.

When data needs to cross an ocean, it almost always travels through submarine cables laid on the seafloor. Many people assume satellites carry most international traffic, but cables do the heavy lifting.

Each cable contains strands of glass fiber about as thin as a human hair. Lasers send pulses of light through those strands, and each pulse represents data.

Content Delivery Networks (CDNs)

If every video had to travel from one central server, the internet would be painfully slow. Content delivery networks solve this by storing copies of popular content, such as videos, images, and web pages, on servers in many cities. When you press play, the video usually comes from a nearby CDN server rather than one across the country or the world. Shorter distance means faster loading and less strain on the network.

What Is Data? Bits, Bytes, and Packets

Data is digital information sent between devices: text, images, video, audio, and app activity. All of it is stored and sent as bits, ones and zeros. Eight bits make one byte.

Internet speeds are measured in bits per second, usually megabits per second (Mbps) or gigabits per second (Gbps). File sizes are usually measured in bytes, such as megabytes (MB) or gigabytes (GB).

What Is a Data Packet?

Data does not travel across the internet in one big piece. It is broken into small chunks called packets, often up to about 1,500 bytes each on most networks. A single web page or photo might be split into hundreds or thousands of packets.

Packet Switching: Why the Internet Is Built This Way

Packets are sent using packet switching. Each packet can travel independently and may even take a different route from the others. Routers forward each packet toward its destination, and the receiving device reassembles them in the correct order.

Think of mailing a large puzzle by sending each piece in its own envelope. Some envelopes may take different routes, but all of them are addressed to the same place, and the instructions show how to put the puzzle back together.

This design has two big benefits:

The Rules of the Road: Internet Protocols

A protocol is a set of rules that devices follow so they can understand each other. The internet relies on several protocols working together in layers.

• IP (Internet Protocol) puts addresses on every packet so it can be routed across networks.
• TCP (Transmission Control Protocol) checks that every packet arrives and resends any that go missing.
• UDP sends data quickly without waiting for confirmation, which suits live video, calls, and games.
• QUIC is a newer transport protocol that powers HTTP/3. It sets up connections faster and encrypts data by default.
• HTTPS is the secure version of HTTP, the protocol your browser uses to load web pages.

Because every connected device follows these same rules, a phone in Ohio can talk to a server in Tokyo without either one knowing anything else about the other.

IP Addresses and DNS: How Data Finds Its Way

What Is an IP Address?

An IP address is a numeric label that identifies a device or network on the internet, much like a mailing address. It tells routers where to deliver packets. There are two kinds you will encounter:

In most homes, all your devices share a single public IP address. Your router keeps track of which device asked for what, using a technique called network address translation (NAT), and passes incoming data to the right device. So while every device has an address, it is not always a unique one on the wider internet.

IPv4 vs IPv6

What Is DNS?

People remember names, but computers use numbers. The Domain Name System (DNS) acts as the internet’s phonebook, translating names like victra.com into IP addresses. Here is what happens when you type a web address:

1. Your device asks a DNS resolverUsually run by your provider or a public DNS service: “What is the address for this name?”
2. The resolver checks its memoryIf someone recently asked for the same name, it answers right away.
3. If not, it asks a chain of DNS serversStarting from the top-level servers for endings such as .com, until it finds the authoritative answer.
4. Your device receives the IP addressIt can now connect to the right server.

DNS lookups usually take only milliseconds, and your device remembers recent answers so it does not have to ask again for every visit.

How Data Travels to Your Device, Step by Step

Let’s follow one tap. Imagine you open a video on your phone.

1. You tap playYour app or browser creates a request for the video.
2. DNS finds the serverYour phone looks up the IP address of the video service, or uses one it already remembers.
3. A secure connection is set upYour phone and the server agree on encryption keys, so no one in between can read the data.
4. Your request leaves your phoneIt travels by radio waves to your Wi-Fi router at home or to a nearby cell tower if you are on 5G or LTE.
5. Your provider’s network takes overThe request travels over fiber or cable. On cellular, it passes through the carrier’s core network, which manages your connection.
6. The request crosses the internetRouters pass it along the backbone and, if needed, across an undersea cable. Often the video is waiting on a nearby CDN server.
7. The server respondsIt sends the video back as a stream of packets, each labeled with your connection’s address.
8. Packets travel back and reassembleYour phone puts them in order, requests any missing pieces, and starts playing the video.

The whole round trip often takes less than a tenth of a second. Streaming services then keep sending packets continuously, filling a small buffer so the video plays smoothly.

The Last Mile: How Your Device Connects

The “last mile” is the final link between the internet and you. It is often the part that most affects your everyday experience.

Wi-Fi and Your Home Router

Wi-Fi uses radio waves to connect your devices to your router, which then connects to your internet provider through fiber, cable, or a wireless link. Newer standards such as Wi-Fi 6, 6E, and 7 support faster speeds and handle more devices at once, but walls, distance, and interference can still weaken the signal.

Your phone can even place calls over Wi-Fi when cell signal is weak. Learn more about Wi-Fi Calling.

5G and 4G LTE

On a cellular connection, your phone sends and receives data by radio to a nearby cell tower. The tower connects by fiber or microwave links to the carrier’s core network, which routes your data to and from the internet.

5G is now the main road for mobile data worldwide. According to the Ericsson Mobility Report (June 2026), 5G subscriptions passed 3 billion, and 5G networks carried about half of all mobile data traffic. Uploads are growing faster than downloads for most providers, driven by video calls, sharing photos and videos, and cloud backups.

Go deeperWhat 5G is and how it works · 5G vs. 4G LTE · 5G Nationwide vs. 5G Ultra Wideband · How mobile hotspots work

Home Internet Types Compared

Verizon expanded its fiber footprint significantly in January 2026, when it completed its acquisition of Frontier Communications, bringing its reach to almost 30 million fiber passings across 31 states and Washington, D.C.

How Fast Does Data Travel?

Inside fiber optic cables, data travels as pulses of light. Light moves at about 186,000 miles per second in a vacuum, but inside glass it slows to roughly two-thirds of that speed, about 124,000 miles (200,000 kilometers) per second.

That is still extraordinarily fast, but distance adds up. Every 1,000 kilometers of fiber adds about 5 milliseconds of one-way delay, before counting the time routers spend processing each packet.

Real-world times are higher because cables rarely follow a straight line and each router hop adds a little delay. This is exactly why CDNs place content close to you.

Speed, Bandwidth, and Latency Explained

High bandwidth helps when you stream 4K video or download large files. Low latency matters for video calls, online gaming, and anything that needs an instant response. For more detail, read what bandwidth is and what internet speed you need. For reference, the FCC currently uses 100 Mbps download and 20 Mbps upload as its benchmark for fixed broadband.

What Slows Your Connection Down?

• Distance and obstacles between your device and your router or cell tower
• Network congestion when many people are online at the same time
• Router placement and age, especially routers hidden in cabinets or corners
• Too many devices streaming or downloading at once
• Device limitations, such as an older phone that does not support newer Wi-Fi or 5G bands
• Distance to the server, especially for content not stored on a nearby CDN

If your phone is the issue, our guide to cell phone signal strength explains what the bars really mean.

How Your Data Stays Secure

As your data crosses dozens of networks, encryption keeps it private.

Encryption protects your data in transit, but good habits protect your accounts:

• Keep your phone, apps, and router updated.
• Avoid entering passwords or payment details on unfamiliar public Wi-Fi.
• Use strong, unique passwords and turn on two-factor authentication.
• Be cautious with unexpected links in texts and emails.

For more tips, see our guide to securing your smartphone.

Quick Fixes When Your Internet Feels Slow

1. Restart your router and deviceIt clears temporary glitches. Here is how to reset your Verizon router.
2. Move closer to your routerOr place the router in a central, elevated, open spot.
3. Switch between Wi-Fi and cellularSee which connection is stronger where you are.
4. Pause large downloads and backupsCheck other devices on your network too.
5. Run a speed testCompare the result with your plan.
6. Update your phone and appsUpdates often improve connectivity.
7. Check your data usageLearn how data plans work and what uses the most data on your phone.

If problems continue, visit a Victra store and our team can help you check your device, plan, and home setup.

More Victra Teaches TechWhat Is Bluetooth? · What Is NFC? · How GPS Works · How Your Phone Knows Your Location · What Is an eSIM?

Frequently Asked Questions

The Bottom Line

The internet is not a single place. It is billions of devices and thousands of networks working together under shared rules. Every time you tap a link, your data is split into packets, labeled with addresses, carried by radio waves, light, and electricity across cities and oceans, and reassembled on your screen, often in less time than it takes to blink.

Understanding how it works helps you make better decisions, from where to place your router to which home internet or phone plan fits the way you live.