What is Wi-Fi?
Wi-Fi is a wireless networking technology that connects devices to a local network using radio waves. Phones, computers, printers and other compatible devices can communicate through an access point. Wi-Fi and internet access are not the same thing; a device connected locally may have no internet connection.
Access points and coverage
An access point connects wireless devices to the network. A home networking box often combines a router, access point and other functions. Walls, distance, neighboring networks and device antennas affect the connection. Because the radio environment is shared, many active devices compete for capacity. The displayed link speed is not the actual download speed of a file; protocol overhead and the internet connection impose additional limits. Frequency bands have different coverage and capacity characteristics. Both client and access point must support a feature to benefit from a newer standard. Replacing the router alone does not solve every bottleneck.
Stability and security
Access points should be positioned for their usage area rather than placed inside cabinets or behind substantial obstructions. Troubleshooting should also compare wired networking and the internet connection. Home networks should use strong unique passwords, updated firmware and supported secure encryption settings. A guest network can help separate visitors from primary devices. Connecting to an open network does not establish who owns it or whether it is trustworthy; sensitive information should not be entered into unexpected login pages. Wireless repeaters can extend coverage but may reduce capacity depending on placement and connection design. Good network design targets stable access where needed, rather than the highest advertised speed.