What network discovery does and why you might want it
Network discovery is a Windows and Mac setting that lets your computer find and communicate with other devices on your home network — printers, external hard drives, other computers, smart TVs. When it is on, your machine broadcasts its presence and listens for broadcasts from other devices. When it is off, your computer stays hidden and cannot see shared files or printers on the network.
The trade-off is straightforward: network discovery makes sharing easier, but it also makes your computer more visible to anything else on your network. If someone gains access to your home Wi-Fi, network discovery turned on gives them an easier path to find your machine and what is on it. If network discovery is off, they have to work harder — they cannot straightforward browse for your computer by name.
Most people turn network discovery on only when they actually need to use a shared printer or access files from another device, then turn it back off. That way you get the convenience when you need it without leaving the door open all the time.
Key Takeaways
- Network discovery on Windows lives in Settings under Network & Internet, and you can turn it on or off for private networks separately from public ones.
- On Mac, network discovery is managed through System Settings under General > Sharing, where you enable file sharing or printer sharing only when you need it.
- Turning network discovery on makes your computer visible to other devices on your network, which is necessary to use shared printers or access shared folders.
- Leaving network discovery off by default and turning it on only when you need to share something is the most find approach for most home networks.
- Network discovery does not protect you from threats outside your home network — it only affects what devices inside your home can see.
How to turn on network discovery in Windows 11
Open Settings by pressing the Windows key and typing "Settings", then click the Settings app. Go to Network & Internet in the left sidebar, then scroll down and click Advanced network options.
Look for Advanced sharing options near the bottom of the page. Click it to expand the menu. You will see two sections: one for "Private" networks and one for "Public" networks. For your home network, you are working with the Private section. Under "Network discovery", click the radio button next to Turn on network discovery. Do the same for "File and printer sharing" if you want to share files or use a network printer.
Windows will ask you to confirm. Click Yes if a dialog appears. The changes take effect when ready. If you want to turn network discovery back off later, return to the same screen and select Turn off network discovery.
How to turn on network discovery in Windows 10
Open Settings and go to Network & Internet, then click Sharing options in the left sidebar. You will see the same Private and Public network sections. Under Private, click Turn on network discovery and Turn on file and printer sharing. Windows will prompt you to confirm; click Yes.
The process is nearly identical to Windows 11 — the menu location changed slightly between versions, but the setting itself works the same way.
How to enable file and printer sharing on Mac
On Mac, network discovery is not a single toggle. Instead, you turn on specific sharing services only when you need them. Open System Settings (or System Preferences on older macOS versions) and click General in the sidebar, then click Sharing.
You will see a list of sharing options: File Sharing, Printer Sharing, Screen Sharing, and others. Check the box next to File Sharing if you want other computers on your network to access your files. Check Printer Sharing if you want to use a network printer. When either is checked, your Mac becomes visible to other devices on the network for that specific purpose.
By default, only users with accounts on your Mac can access shared files. If you want to share with guest users, click Options and check Allow guests to connect to shared folders. Turn off any sharing service you are not actively using — the fewer services running, the smaller your network footprint.
What to do if you cannot find the network discovery setting
On Windows, if Advanced network options does not appear, your network connection may be set to Public instead of Private. Go back to Network & Internet and look for Properties or Status. You should see a line that says "Network profile". If it says Public, click it and change it to Private. Then return to Advanced sharing options — the setting should now be visible.
On Mac, if Sharing does not appear in System Settings, you may be on an older version of macOS. Click the Apple menu, then System Preferences instead of System Settings, and look for Sharing there. The layout is slightly different but the options are the same.
Network discovery and your router settings
Turning on network discovery in Windows or Mac does not change your router settings. Your router is a separate device that controls what traffic comes in and out of your home network. Network discovery only affects whether your computer is visible to other devices already on your home Wi-Fi.
If you want to prevent devices outside your home from seeing your network at all, that is a router setting — usually called hiding your SSID or turning off broadcast. That is a different step from network discovery and is covered in your router's manual or admin panel (usually accessed by typing your router's IP address into a browser).
When to leave network discovery on versus off
Leave network discovery on if you regularly use a shared printer, access files from another computer on your network, or stream media between devices. The convenience is real and the risk is low if your Wi-Fi password is strong and you trust everyone on your network.
Leave network discovery off if you live in an apartment building with shared Wi-Fi, use public Wi-Fi regularly, or have guests on your network whose devices you do not trust. You can always turn it on temporarily when you need to print or share something, then turn it back off when you are done.
If you are not sure whether you need it, start with it off. You will notice when ready if you cannot access a printer or shared folder — that is your signal to turn it back on.
Frequently Asked Questions
Does network discovery let people outside my home see my computer?
No. Network discovery only makes your computer visible to other devices on your home network — the devices connected to your Wi-Fi or ethernet. People outside your home cannot see your computer through network discovery, even if they know your Wi-Fi name. Your router acts as a barrier.
If I turn off network discovery, can I still use my printer?
It depends on how your printer is set up. If you added it by IP address or through a direct connection, it will work. If you added it by browsing the network, you will need to turn network discovery back on to find it again. Most modern printers let you add them by IP address, which works without network discovery.
Will turning on network discovery slow down my internet?
No. Network discovery uses very little bandwidth — it is just your computer announcing itself to other devices on the same network. You will not notice any speed difference whether it is on or off.
What if I share my Wi-Fi with family or roommates?
You can leave network discovery on if you trust everyone on the network. If you do not want them browsing your files, turn off file sharing even if network discovery is on. That way they can see your computer exists, but they cannot access anything on it.
Can I turn network discovery on just for one device?
No. Network discovery is a setting on your own computer, not something you control for other devices. When you turn it on, your computer becomes visible to all devices on the network. You cannot make it visible to one device and hidden from another.