Isolating the Bottleneck: Hardware vs ISP
Before spending hours changing settings or purchasing new equipment, it is essential to determine whether your slow internet speed is caused by your local hardware or by your service provider. A simple way to isolate this is by connecting a computer directly to your modem using an Ethernet cable. If this direct connection is fast, your ISP is delivering the correct speed, and the problem lies with your router or Wi-Fi.
If the direct connection to the modem is still slow, the bottleneck is external. It could be an outage in your area, a degraded physical line coming into your building, or your ISP throttling your connection because of high network usage. In this scenario, no amount of router tweaking will fix the problem, and you must contact your provider to investigate the line.
Isolating the source of the slowdown saves time and prevents unnecessary adjustments. If the issue is local, you can proceed with optimizing your home network configuration. If the issue is external, you can hold your provider accountable for delivering the service you pay for each month.