You probably don't need two routers — do this instead

Two routers can work in some specific situations, but there are other devices that work better to achieve most network needs.

Adding a second router can seem like an easy fix for weak Wi-Fi. Put another box at the other end of the house, connect it to the first router, and you've got another wireless network. The trouble starts when both devices are left in router mode, because each can create and manage its own private network.

Most homes only need one device doing the actual routing. If you need better coverage or more connections, the cleaner approach is usually to extend the network the existing router already manages, rather than creating another routed network behind it.

A home router creates your local network, then uses Network Address Translation (NAT) so its connected devices share a connection with the internet. The job of a router isn't just to broadcast Wi-Fi; it sorts the incoming and outgoing traffic on your network so all information arrives at the right place. When you connect a second router in normal router mode behind the first, the second device creates another private network while also performing NAT. This arrangement is known as double NAT.

That doesn't necessarily make normal web browsing or streaming noticeably slower. Double NAT has no major effect on network performance for most cases. Problems are more likely to appear with tasks that depend on connections reaching a particular device, including online gaming, port forwarding and Universal Plug and Play (UPnP).

Running two private networks can also make it harder for devices to find each other. For example, a computer connected to the first router and a printer connected to the second may end up on different networks, even though they're in the same home. This adds unnecessary complication.

If coverage is your problem, a mesh Wi-Fi system is built for extending one network throughout a home. Its nodes work together, rather than each creating an independent routed network. This makes mesh a much cleaner solution than placing another router in a weak-signal area.

You may also be able to reuse a router you already own for this task. Many models include access point (AP) mode, which has the device simply act as a Wi-Fi connection point while the primary router continues managing the network. In AP mode, most routers will disable features such as firewall and IP sharing because the main router handles those functions.