Yes, Ethernet cables can slow your connection (Here's how)

Ethernet is a wired networking technology that transmits data using copper cables to provide fast and reliable connections with minimal latency. As such, a faulty Ethernet cable could slow your internet connection.

There are many reasons why this may occur:

• Outdated cable types
• Physical damage to the cable
• Excessive cable length exceeding its performance specifications

Let’s review a few reasons why a bad Ethernet cable might impact your home network.

Issues like worn-out connectors, broken clips or damaged internal wiring can disrupt data transmission, causing low bandwidth, inconsistent performance or even disconnections.

The quality, type and condition of your Ethernet cable help to maintain stable, high-speed connections.

If you’re unsure about where to start with troubleshooting your Ethernet connection, keep in mind the following:

• Category: The category of your Ethernet cable directly affects connection speed and reliability. Older Cat5 cables cap speeds at 100 Mbps, while newer Cat5e and Cat6 cables deliver faster, more efficient performance.
• Length: Ethernet cables work best at lengths under 100 meters, as exceeding this can cause signal loss and slower speeds. Choose the shortest cable that fits your setup.
• Interference: Keep Ethernet cables away from high-interference devices like microwaves to maintain signal quality. Use shielded cables or adjust placement to reduce interference.
• Damage: Frayed wires, bent connectors or broken clips can disrupt your connection. Inspect cables regularly and replace any with visible wear. Avoid sharp bends, tight coils or placing cables under heavy objects.
• Connector quality: Even with the right cable, poor-quality connectors can slow your internet. Use shielded RJ45 connectors which securely transmit data to devices and reduce electromagnetic interference.
• Hardware compatibility: Your Ethernet cable must align with your device’s capabilities. For instance, connecting a Gigabit Ethernet cable to an older Fast Ethernet port will limit speeds to 100 Mbps.
• Replace aging cables: Ethernet cables can wear out over time, affecting speed and reliability. Consider replacing cables every 3–5 years or when issues arise.

The type of internet connection you have will determine the modem and router equipment required. The modem and router will affect your internet speed if they are not compatible.

Now, let’s learn how to identify, troubleshoot and resolve common Ethernet cable and slow internet problems to improve your internet connection.

Internet connections and speeds can be affected by a number of factors. If you’re using a wired Ethernet connection, follow these common troubleshooting steps.

First, identify signs that your Ethernet cable is the issue and not other hardware. Swap the cable to a different Ethernet port on your router to rule out port failure.

Plug the Ethernet cable into a different device, such as another laptop or desktop, to determine if the issue is with the original device or the cable. Inspect the cable for any physical damage.

If that does not resolve the issue, test your Ethernet cables using diagnostic tools. You can use hardware like an Ethernet cable tester, or run ping and tracert commands.

Make sure your connected device is properly configured in the IP settings and that all network adapter drivers on your device and the firmware on your router/modem is up to date.

If you still face issues, replace the cable with a modern Ethernet cable. There are many different types of Ethernet cables, all of which serve different functions.

Optimizing your WiFi speed in areas with weak signals means understanding what may limit coverage in your home or apartment. To start, assess your router placement—centralize it in an open area away from walls, windows or electronic devices that can interfere with the signal.

Updating outdated routers, ensuring firmware is current and upgrading to the latest WiFi 6 or WiFi 6e can further improve range and speed, ensuring every corner of your home gets reliable internet access.

Learn more: What’s the difference between WiFi 5, WiFi 6 and WiFi 7.

If your WiFi still can’t reach, consider using a mesh WiFi system, like eero, to enhance coverage and distribute WiFi signals evenly in your home. Mesh systems provide many benefits to your home network compared to traditional WiFi, such as better coverage, automatic configuration and connection, multi-device support and management via smartphone apps.

If you’re consistently experiencing slow connections over Ethernet and WiFi, it may be time to upgrade to a faster internet speed. With a faster internet speed, you’ll be able to handle more devices, improve download and upload speeds and reduce buffering or lag – especially important for activities like gaming, streaming and working from home.

Faster speeds also ensure your network can deliver your internet plan’s full potential to all connected devices. When selecting an upgrade, consider your household’s usage patterns and the number of connected devices.

Casual users who primarily browse, check emails or stream in standard definition typically require speeds under 300 Mbps. On the other hand, moderate users engaged in HD streaming, frequent video calls or online gaming need faster speeds of around 600 Mbps.

Heavy users—those downloading large files, streaming in 4K or working remotely—should aim for internet plans with 1 Gig speeds or more, especially in households with multiple devices and users.

If you’re on the hunt for an internet service provider, consider factors such as speed and bandwidth, cost, availability, reliability, customer service, contract terms and extra features, such as TV, internet and phone bundles.

Yes, Ethernet cables can slow your connection, but only under certain conditions. Outdated, damaged cables or lengths beyond 100 meters can contribute to reduced speeds and performance issues. Interference from nearby electronics and poor-quality connectors can degrade your internet connection.

For best performance, use modern cables like Cat5e or Cat6, regularly inspect for physical damage and keep cables clear of high-interference devices.

Upgrading your internet plan, router and network equipment can also help you take full advantage of your connection. Ethernet remains a highly reliable and secure option for stable internet access, but maintaining the quality of your cables, network and hardware, as well as partnering with a dedicated ISP, is essential for achieving high speeds.