How to connect a router to a PC via a cable for WiFi sharing

Establishing a stable wired connection between a personal computer and a router is a basic skill required for initial equipment setup or ensuring maximum data transfer speeds. Despite the widespread adoption of wireless technologies, the wired method remains the benchmark for reliability, eliminating interference and packet loss typical of radio channels. Direct connection This is often required when you first start up your device, when the Wi-Fi network has not yet been configured, or in situations where maximum throughput is required for working with large files or online games.

The process is physically simple, but it requires attention to detail when selecting ports and subsequently configuring the operating system. Errors during the switching process can result in the computer not seeing the network, or the internet not working even with properly functioning ISP equipment. In this article, we'll cover all the steps in detail, from cable selection to fine-tuning the settings. TCP/IP in the Windows environment.

Before you begin tinkering with the equipment, you must ensure that you have a working network cable, known as Ethernet or LANThe standard length of such cables is usually between 1.5 and 5 meters, which is quite sufficient for home use. It is important to check the integrity of the insulation and connectors, as mechanical damage can cause an unstable connection or even a complete failure.

Equipment preparation and cable selection

The first step in setting up a wired network is to correctly identify the ports on the back of the router and the computer's network card. Routers, regardless of brand, whether TP-Link, ASUS or MikroTik, have specific color coding of ports. Ports for connecting client devices (computers, laptops, set-top boxes) are usually colored yellow and numbered (1, 2, 3, 4), while the port for the incoming signal from the provider is often highlighted in blue and labeled as WAN or Internet.

Using the wrong cable can limit connection speed. Cable is the standard for modern networks. Cat 5e or Cat 6, which is capable of providing gigabit data transfer rates of up to 1 Gbps. Older Cat 5 cables may limit speeds to 100 Mbps, which is often a bottleneck in modern environments. Visually, they may look identical, so it's best to check the markings on the outer jacket of the cable.

⚠️ Caution: Never connect the ISP cable (internet cable) to the router's yellow LAN ports or the computer cable to the blue WAN port during initial setup. This is a common error and will prevent the device from creating a local network for management.

To connect a PC and a router, you'll need a cable terminated with RJ-45 connectors on both ends. The crimping pattern should be straight-through, which is the standard for connecting disparate equipment (computer to router). If you're using a ready-made patch cord from a store, it's already configured correctly. Crimping yourself requires a special tool called a crimper and maintaining the correct color sequence for the wires.

Physical connection of devices

The process of switching devices doesn't require any special technical skills, but it should be performed sequentially to avoid equipment conflicts. First, make sure the router is plugged in and operational, as indicated by the blinking power indicator. Then, take the prepared Ethernet-cable and insert one end into any of the free ports LAN on the back of the router. A distinctive click will lock the connector into place.

The other end of the cable connects to the network port of your desktop computer or laptop. On desktop computers, this port is usually located on the back of the system unit, as part of the motherboard. If you're using a laptop without a built-in RJ-45 port, you'll need an external one. USB-to-Ethernet An adapter that also plugs into the corresponding USB port. Once connected, the router's indicator light corresponding to the LAN port in use should light up or blink.

• 🔌 Insert one end of the cable into the port LAN 1 (or any other yellow port) on the router until it clicks.
• 💻 Connect the other end of the cable to the network port on your computer or to a USB adapter.
• 🔍 Check the indicator: the LED next to the used port on the router should be lit or blinking.
• 🖥️ An icon for a connected network connection should appear in the system tray (near the clock) on your computer.

If the indicators don't light up, try replacing the cable or using a different port on the router. Sometimes the problem lies in a software-based network card disablement in the operating system. In this case, the physical connection is present, but the logical connection is missing. Make sure the network card isn't blocked in the BIOS or Device Manager.

Configuring a network card in Windows

After a successful physical connection, the operating system should automatically detect the new hardware and attempt to obtain network settings. In most cases, the protocol is enabled by default in Windows. DHCP (Dynamic Host Configuration Protocol), which allows the router to automatically assign an IP address to the computer. However, if automatic configuration fails, manual adjustments to the adapter settings will be required.

To access the settings, press the key combination Win + R, enter the command ncpa.cpl and press Enter. The "Network Connections" window will open, where you need to find your active Ethernet connection. Right-click on it and select "Properties." In the list of components that opens, find the line Internet Protocol version 4 (TCP/IPv4), select it and click the "Properties" button again.

In the window that opens, ensure the radio buttons "Obtain an IP address automatically" and "Obtain DNS server address automatically" are selected. This is the standard configuration for home use, where the router acts as the address server. If static addresses were previously assigned here, they should be removed or switched to automatic mode to avoid address conflicts on the local network.

After making changes, be sure to click "OK" in all open windows to apply the settings. The system may interrupt the connection for a few seconds to reconnect with the new settings. If the network still doesn't work, try resetting the network settings from the command prompt running as administrator using the command netsh int ip reset.