How Wi-Fi reaches your devices

A wireless connection uses radio

Your device and a wireless access point exchange information using radio signals. In many homes, the access point is built into the router. The useful signal depends on distance, obstacles, interference, and the capabilities of both devices.

Frequency bands are not internet plans

Common Wi-Fi bands include 2.4 GHz and 5 GHz; some newer equipment also supports 6 GHz. GHz describes radio frequency, while Mbps describes a data transfer rate. A 5 GHz Wi-Fi network is also different from a cellular 5G service.

Coverage and capacity differ

Coverage concerns where a connection can be maintained. Capacity concerns how much data a connection can carry. A large coverage area does not automatically mean high transfer rates everywhere within it.

Walls, building materials, neighboring wireless activity, and the location of equipment influence signal conditions. A room’s distance from a router is only one part of the picture.

What mesh means

A mesh Wi-Fi system uses multiple coordinated devices to extend a local network. Those devices also need to communicate with each other. Adding mesh equipment does not, by itself, change the internet service purchased from a provider.

Read more

Xfinity: Wi-Fi basics (external PDF). Use your equipment’s official documentation for model-specific information.

Wireless airtime is shared

Wi-Fi devices using the same radio channel share opportunities to transmit. Nearby activity and the abilities of connected devices can affect that shared space. The number of signal bars on a phone does not describe all of these conditions.

Signal strength is only one measurement

Signal bars are a simplified indication produced by your device. They are not a direct measurement of the internet plan, the speed of a distant website, or every aspect of wireless quality. Two devices may also display signal information differently.

Network names and passwords have different jobs

A network name, also called an SSID, helps people identify a wireless network. A password controls access when the network uses password-based protection. Knowing the name is not the same as being authorized to join.

Wired and wireless connections

Ethernet uses a physical cable for the local link. Wi-Fi offers mobility through radio communication. Both can connect to the same router and use the same provider service. Neither label alone guarantees a particular application experience.