A Local Area Network for 3 Computers via a Wi-Fi Router: A Complete Guide from A to Z

Creating a local network between three computers via Wi-Fi router — a task that seems complicated only at first glance. In practice, it is enough to correctly configure the network on the router and assign the correct addresses to the devices. IP addresses, share folders and printers—and you'll have a fully functional home or office network with file sharing, peripheral sharing, and even online gaming. In this article, we'll walk you through the process step by step, from choosing the right hardware to troubleshooting common errors.

It is important to understand that modern routers (for example, TP-Link Archer AX6000, ASUS RT-AX88U or Keenetic Ultra) already contain all the necessary functions for organizing a local network - you won't need additional software or complex settings. However, even with simple equipment (say, Tenda AC10 or D-Link DIR-615) You can achieve stable operation by following a proven method. The key is to avoid common errors, such as IP address conflicts or incorrect firewall settings.

Unlike wired networks (where Ethernet Wireless LAN (like routers and switches) has its own set of challenges: limited bandwidth, vulnerability to interference, and the need for security configuration. However, with the right approach, it's just as reliable—and often superior, as it eliminates cabling issues. Below, we'll cover all the steps, from preparing the equipment to testing the connection.

1. What you need to create a local network via a Wi-Fi router

Before you begin setup, make sure you have all the necessary equipment and data. Here's the bare minimum:

• 📡 Wi-Fi router with standard support 802.11n/ac/ax (preferably dual-band for stability). Models from TP-Link, ASUS, Keenetic or MikroTik.
• 💻 Three computers (or laptops) with Wi-Fi adaptersOn . Windows 10/11 or macOS the setting is similar for Linux additional actions may be required.
• 🔌 A power supply for the router and computers. If you plan to use Powerline adapters To expand the network, they also need to be prepared.
• 📄 Login details for the router control panel: IP address (usually 192.168.0.1 or 192.168.1.1), login and password (often by default admin/admin).

Please note: If your router supports guest network, it's best to disable it during setup—it can create conflicts with the main network. Also, make sure all computers have the latest drivers for their network adapters (especially important for Wi-Fi 6 And Wi-Fi 6E).

⚠️ Attention: If you are using a router from a provider (for example, Rostelecom or Beeline), some settings may be locked. In this case, please contact support or request access to advanced settings.

For maximum stability, it is recommended to use routers with support MU-MIMO And Beamforming — these technologies optimize the operation of several devices simultaneously. If your router is older than 5 years, it might be worth considering an upgrade: new standards (Wi-Fi 6 And Wi-Fi 6E) provide lower latency and higher throughput, which is critical for online gaming or transferring large files.

2. Setting up a Wi-Fi router for a local network

The first step is to configure your router correctly. Access its control panel through your browser by entering IP address (indicated on the device sticker). Usually this is 192.168.0.1 or 192.168.1.1. Log in using your username and password (often by default) admin).

The main parameters to configure are:

• 🔄 Opening hours: Make sure your router is in wireless mode. Router (and not Repeater or Bridge).
• 📡 Network Name (SSID): Set a unique name for your network (e.g. HomeLAN_5GHz). Avoid spaces and special characters.
• 🔒 Security type: Select WPA2-PSK or WPA3-PSK (the latter is preferable if all devices support it).
• 📶 Channel and width: For 2.4 GHz select a channel 1, 6 or 11 (least loaded). For 5 GHz use 36-48 or 149-165 (depending on the region). Set the channel width to 20/40 MHz For 2.4 GHz And 80 MHz For 5 GHz.
• 🔄 DHCP server: Turn it on and set the range of output IP addresses (for example, from 192.168.0.100 to 192.168.0.200).

After applying the settings, reboot the router. All computers should now connect to the created Wi-Fi network. If any devices are unable to see the network, check:

• 🔌 Is the router connected to power and is Wi-Fi enabled on the computers?
• 📶 Does your network name conflict with neighboring ones (use applications like Wi-Fi Analyzer for ether analysis).
• 🔄 Are the security settings on the router and client devices compatible (e.g. Windows 7 does not support WPA3).

Is the DHCP server enabled? Is the correct IP address range set? Is a free Wi-Fi channel selected? Are the security settings on all devices the same? Has the router been rebooted after changes?

3. Configuring network settings on computers

By default, all computers on the network should automatically receive IP addresses from the router through DHCPHowever, for stable operation of the local network it is better to assign static IP addresses manually. This will avoid conflicts and simplify sharing settings.

Instructions for Windows 10/11:

1. Open Settings → Network and Internet → Wi-Fi.
2. Select your network and click Equipment properties.
3. Scroll to IP assignment and select Manually.
4. Turn on IPv4 and enter:
   • IP address: 192.168.0.101 (for the first PC), 192.168.0.102 (for the second), 192.168.0.103 (for the third).
   • Subnet mask: 255.255.255.0.
   • Gateway: 192.168.0.1 (your router's IP).
   • DNS: 192.168.0.1 or 8.8.8.8 (Google DNS).

Save the settings and restart your computer.

For macOS the path will be like this: System Preferences → Network → Wi-Fi → Advanced → TCP/IP. Here also select Manually and enter similar parameters.

⚠️ Attention: If you use VPN or proxy server, they can block local interaction. Disable them or add range exceptions while setting up 192.168.0.0/24.

Critical detail: if your router has an IP address 192.168.1.1, and not 192.168.0.1, all static addresses must be from the subnet 192.168.1.x (For example, 192.168.1.101). Check the current IP of the router in its control panel or via the command ipconfig V Command line.

4. Sharing files and folders

Now that all computers are connected to the same network and have the correct IP addresses, you can set up shared access. This will allow you to share files without using flash drives or cloud services.

On Windows do the following:

1. Create a folder you want to share (e.g. D:\Shared Access).
2. Right click on it → Properties → Access → Share.
3. Select users (eg. All) and set the access level (Reading or Reading and writing).
4. Go to the tab Security and add the same users with the appropriate rights.

For macOS:

1. Open System Preferences → Sharing.
2. Turn on File sharing and add the folder to the list.
3. Set up access rights for users (guest access or specific accounts).

To access a shared folder from another computer:

• 🖥️ On Windows open Conductor and enter in the address bar \\192.168.0.101\folder_name (replace IP with the current one).
• 🍎 On macOS V Finder select Go → Connect to server and enter smb://192.168.0.101/folder_name.

5. Setting up printer sharing

One of the main advantages of a local network is the ability to use one printer from multiple computers. To do this:

1. Connect the printer to one of the PCs (for example, via USB or Ethernet).
2. Install the drivers and make sure the printer works locally.
3. Open Settings → Devices → Printers & Scanners, select your printer and click Control.
4. Enable the option Share this printer.

On other computers:

1. Open Settings → Devices → Printers & Scanners → Add a Printer.
2. Select Add a printer by TCP/IP address and enter IP address the computer to which the printer is connected (for example, 192.168.0.101).
3. Install the drivers if they are not downloaded automatically.

For network printers (with own IP address) the process is even simpler: just add the device by its address, bypassing the intermediate computer.

⚠️ Attention: If the printer is connected to the router via USB port, its settings may differ. In this case, check whether your router supports the function USB print servers (available on models ASUS RT-AX88U, TP-Link Archer C5400 and others).

6. Checking the connection and troubleshooting

After setup, you need to ensure that all computers can see each other and exchange data. Here's how:

• 🔍 Ping: Open Command line (Win + R → cmd) and run the command:

  ping 192.168.0.102

  (replace with the IP of another computer). If the responses are uninterrupted, the connection is working.

• 🖥️ Visibility check: IN Conductor Windows go to Net - all devices from the local network should be displayed here.
• 📂 File transfer test: Copy a small file to a shared folder from one PC and check if it is present on another.

Typical problems and their solutions:

If problems persist, check:

• 🔥 Settings firewall (turn it off temporarily for testing).
• 🔄 Antivirus (some, for example Kaspersky or ESET, block local traffic).
• 📡 Router firmware (update it through the control panel).

How do I reset my router to factory settings if nothing works?

To reset your router, find the button on its body. Reset (usually recessed into the case). Press it with a thin object (like a paperclip) and hold it for 10-15 seconds until the lights start flashing. After this, the router will reboot with factory settings. Warning: all your configurations (including the Wi-Fi password) will be lost!

7. Additional local network capabilities

Beyond basic file and printer sharing, a local network offers a number of additional capabilities:

• 🎮 Online games: Many games (for example, Minecraft, Counter-Strike, Terraria) support multiplayer over a local network. To do this, simply launch the server on one PC and connect to it from the others via local network. IP.
• 🖥️ Remote Desktop: By using RDP (built into Windows Pro) or TeamViewer You can control another computer on the network.
• 📡 Media server: Set up Plex or Kodi for streaming movies and music to all devices on the network.
• 🔄 Backup: Automate backups of important files to another computer with Robocopy (Windows) or rsync (macOS/Linux).

It is especially important for online games minimal delay (ping). If the game is lagging, try:

• 📶 Switch from 2.4 GHz on 5 GHz (less interference).
• 🔧 Enable QoS on the router (traffic prioritization for games).
• 🖧 Use Ethernet instead of Wi-Fi (if possible).

For the organization media servers you can use an old computer or even Raspberry Pi. Install on it Plex Media Server or Jellyfin, add folders with movies and music, and then connect to the server from other devices via a browser or a special application.

8. Local network security

A local network connected to the internet is vulnerable to external attacks. To protect it:

• 🔒 Change the default router password (use a complex combination of letters, numbers and symbols).
• 📡 Disable WPS - This protocol is vulnerable to hacking.
• 🖥️ Set up a guest network for devices that don't need access to local resources (e.g. friends' smartphones).
• 🔄 Update your router firmware to the latest version (fixes vulnerabilities).
• 🛡️ Turn on the firewall on the router and on all computers.

For additional protection, you can:

• 📋 Create a separate subnet For IoT devices (smart bulbs, cameras) - many routers (for example, Keenetic) support network segmentation.
• 🔑 Use VPN for remote access (For example, WireGuard or OpenVPN), if you need to connect to a local network from outside.
• 📊 Enable logging on the router to monitor suspicious activity.

⚠️ Attention: If you store sensitive data (such as work documents) on your network, consider using folder encryption (through BitLocker on Windows or FileVault on macOS) or organizations VLAN (virtual local area networks) on supported routers.

FAQ: Frequently asked questions about setting up a local network

Is it possible to create a local network without a router, using only Wi-Fi adapters?

Yes, it is possible with the mode Ad-Hoc (for Windows) or creation access points on one of the computers. However, such a connection will be less stable, and the number of connected devices is limited (usually no more than 8). A router provides a more reliable and scalable network.

Why can computers see each other but can't exchange files?

The most likely reasons are:

• 🔥 Blocking firewall or antivirus (check exceptions).
• 🖥️ Incompatible protocol versions SMB (set up SMB 2.0 or SMB 3.0 on all PCs).
• 🔑 Incorrect folder permissions (check the tab Security in the folder properties).

How to connect a smartphone or tablet to a local network?

Smartphones on Android or iOS can connect to a local network via Wi-Fi, but to access shared folders you will need a special application (for example, ES File Explorer for Android or FileExplorer for iOS). Enter in the app IP address computer (for example, smb://192.168.0.101) and log in with your Windows credentials.

Is it possible to use one router for two local networks (for example, for home and office)?

Yes, many routers (for example, MikroTik or Ubiquiti) support the creation of multiple VLAN (virtual networks) on a single device. This allows you to separate traffic from home and work devices, limiting access between them. Configuration requires support. 802.1Q and the corresponding settings in the control panel.

How to increase file transfer speed on a local network?

The speed depends on several factors:

• 📶 Wi-Fi standard: 802.11ac (Wi-Fi 5) gives up to 1.3 Gbps, A 802.11ax (Wi-Fi 6) - up to 9.6 Gbps.
• 🔧 Channel and width: On 5 GHz use channel width 80 MHz or 160 MHz (if supported).
• 🖧 Wired connection: Gigabit Ethernet (1000 Mbps) is always faster than Wi-Fi.
• 💾 Hard drive type: If the files are stored on HDD, speed is limited 100-150 MB/s. SSD or NVMe will give an increase of up to 500 MB/s and above.

Also check if another device (for example, a torrent client or an online game) is loading the network.