When the speed and range of your wireless router isn't cutting it, the easy answer is to replace it with a budget or midrange mesh networking system. The main router in a mesh system connects to your modem over Ethernet, and extends the network to additional satellite router nodes. In theory, the result is better coverage and more reliable wireless connections. The limitations of Wi-Fi make that ideal situation difficult to replicate in the real world. The success of your mesh Wi-Fi network might depend on exactly how wireless it is.