If you’ve ever connected to the internet, your device has used something called an IP address, even if you didn’t realize it. It’s a key part of how the internet works behind the scenes.
In this Tech Terms post, we’ll explain what an IP address is, what it does, and why it matters when you’re online.
What is an IP Address? Tech Terms Explained (Transcript)
An IP address is like a street address for your device on the internet. It’s a unique number that tells other computers where to send information like emails, websites, or videos.
IP stands for Internet Protocol. There are two main types: IPv4, which uses shorter numbers, and IPv6, which uses newer, longer ones.
Every time you visit a website, your device’s IP address helps send and receive data, just like mail going to the right house.
What Is an IP Address?
An IP address is a unique number assigned to your device when it connects to the internet.
In simple terms, it acts like an identifier that helps your device communicate with websites and online services.
When you go online, a few things happen. First, your device sends a request, such as opening a website. Then, the IP address tells the Internet where to send the response. As a result, the correct information loads on your screen.
A Simple Example
Imagine sending a letter through the mail:
- Without an address, it wouldn’t know where to go
- With the correct address, it arrives at the right house
An IP address works the same way by directing information to the correct device.AA
Why IP Addresses Matter
IP addresses enable devices to find and communicate with each other online. Because of this, they are essential to how the internet works.minimalist bauhaus mondrian style illustration showing how an IP address works, geometric flow diagram from a computer to a network node to a server and back, arrows indicating request and response, small abstract blocks representing data packets, clean grid layout, right-weighted composition, navy blue muted teal mustard palette, cream textured background, long soft shadows, flat vector style, no text labels
For example:
- They make sure data reaches the correct destination
- They allow websites to load on your device
- They help devices send and receive information
Without IP addresses, the internet wouldn’t be able to function.
What an IP Address Does
When you connect to the internet, your device uses its IP address to send and receive information.
Here’s what happens:
First, your device connects to a network and is assigned an IP address
Next, you request a website or service
Then, the request is sent using that address
Finally, the website sends data back to your device
Types of IP Addresses (IPv4 and IPv6)
There are two main types:
- IPv4 uses shorter numbers, like 192.168.1.1
- IPv6 uses a longer format with more combinations
Both serve the same purpose, but IPv6 allows for many more devices.
When You See IP Addresses
You may not always notice them, but IP addresses are involved whenever you:
- Visit a website
- Send or receive email
- Stream videos
- Use internet-connected apps
That means IP addresses are part of almost everything you do online, even when you do not see them.
How IP Addresses Connect to Other Tech Terms
IP addresses work alongside other parts of the internet to help everything function smoothly.
For example, DNS translates website names into IP addresses so your device can find the correct destination. Similarly, URLs are what you type into your browser, and behind the scenes, your device uses an IP address to connect to that location. To learn more, see our post What Is a URL? Tech Terms Explained.
In addition, tools like VPNs can hide your real IP address by routing your connection through a secure server, helping protect your privacy. Look out for an upcoming blog post, What is a VPN and How Does it Work?, for more information.
Quick Summary
Here’s the short version:
An IP address allows websites and services to communicate with your device
Every time you go online, your IP address is being used
An IP address is a unique identifier for your device
It tells the internet where to send information
Additional Learning Resource
If you’d like to explore this topic in more detail, you can read a beginner-friendly explanation of IP addresses from NordLayer, which provides a deeper look at how IP addresses work and why they matter.
See all of our SDM Tech Terms short videos on the SDM YouTube channel.
