Network is sues
Five problems that commonly afflict home networks, discussed and solved
> Wi-Fi frequency
Fix congestion issues
These days, many wireless networks overlap due to their number and extended range, which can cause interference that manifests with poor performance and connection issues at shorter-than-expected ranges. Add in an ever-growing number of devices trying to share a single channel and you can see how problems can occur.
If you have an 802.11ac router that can broadcast on the 2.4GHz and 5GHz bands, which are divided into several narrower channels, try moving some devices onto the less crowded and congested 5GHz band, particularly those close to the router.
2.4GHz networks also transmit over several overlapping channels — 1 through to 14 in the US — and moving your network to a less crowded one can also have a marked impact on performance. Use Spotlight to find and open Wireless Diagnostics. In that tool, choose Window > Scan. Use the summary page to see which channel is recommended under ‘Best 2.4GHz’, then use your router’s configuration utility to switch it to broadcast on this channel.
You can set Apple’s routers to broadcast a separate 5GHz network in AirPort Utility.