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Your home network explained
In short: A home network is all the devices in your home that share one internet connection through your router. The router hands out addresses, creates the Wi-Fi and protects the network from the internet. A few simple settings, such as a strong Wi-Fi password, updates and a guest network, make it faster and safer.
What makes up a home network
A network is a group of devices connected so they can share information. In most homes the network looks like this:
- The line from your provider: fibre, cable, phone line or a mobile signal.
- The router (often called the hub): the box that connects your home to the internet and creates the Wi-Fi. Read Router vs modem for the two jobs it usually does.
- Wired devices plugged in with network cables, such as a desktop PC or games console.
- Wireless devices on Wi-Fi: phones, laptops, tablets, smart TVs, speakers, cameras and plugs.
- Extras in bigger homes: mesh units or extenders that spread Wi-Fi further.
What the router does for you
- Shares one connection between every device in the house.
- Hands out addresses: each device gets its own private address inside the home, a bit like room numbers in a hotel.
- Translates addresses: the whole house appears to the internet as one public address. This also hides your devices from direct contact from outside.
- Creates the Wi-Fi and encrypts it with your Wi-Fi password.
- Acts as a basic firewall, blocking unrequested connections from the internet.
Our article What's an IP address? explains the addresses in more detail.
Five quick checks
- Change the router's admin password from the factory default. This is the password for the router's settings page, not the Wi-Fi.
- Use WPA2 or WPA3 Wi-Fi security with a long password nobody can guess.
- Update the router. Many update themselves; check the settings page or the provider's app.
- Turn on a guest network for visitors and, ideally, for smart gadgets. This keeps them separate from your laptops and phones.
- Review connected devices in the router app. Remove anything you do not recognise and change the Wi-Fi password if needed.
Tip: Write the router admin password and Wi-Fi password on paper and keep it somewhere safe at home. It saves a lot of frustration later.
Making it faster
- Put the router in a central, open spot, off the floor and away from thick walls, mirrors and fish tanks.
- Use a cable for devices that stay in one place, such as a TV or desktop.
- For larger homes, a mesh system often works better than a single extender.
- Restart the router occasionally if things feel sluggish.
Our guide How Wi-Fi works explains why distance and walls matter.
Want the technical version?
Read What is a network?, NAT explained and DHCP explained.
When something stops working
If nothing in the house can get online, look at the router's lights and restart it: switch it off, wait about thirty seconds and switch it on again. If one device cannot connect but the others can, restart that device and check it is on the right Wi-Fi network. If the router's lights show a problem with the line, check your provider's service status page or app before spending time on your own equipment.
Keep a short note of your provider's support number and your account number alongside the passwords. When you call, say what you have already tried. It gets you to a solution faster.
Key takeaways
- A home network is all your devices sharing one connection through the router.
- The router hands out addresses, creates the Wi-Fi and blocks unrequested traffic from the internet.
- Change default passwords, use WPA2 or WPA3, update the router and use a guest network.
- Router placement and cables for fixed devices make the biggest speed difference.
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