-70 dBm: This is the lowest acceptable signal strength value.-50 dBm: This is a good WiFi signal strength for most users, and achieving it should be difficult even in less than ideal conditions.Achieving a better signal strength would require laboratory conditions. -20 dBm: This is as good as it gets in the real world.Since you want to lose as much signal strength as possible, you also want to see small RSSI values (closer to zero, the better). This value is a measurement of the power present in a received radio signal, and it basically tells you how much signal strength has been lost from the time the signal left your WiFi router and until the signal reached your Mac. WiFi signal strength is commonly expressed using a value referred to as RSSI, which stands for received signal strength indicator. What do Mac WiFi Signal Strength Numbers Mean? That said, a well-optimized wireless network can make even a subpar Internet connection more bearable, sometimes even satisfactory. If your ISP offers poor speeds and horrible latency, you can optimize your wireless network as much as you want, but it will never be perfect. Network load: Even the best WiFi router won’t help you overcome the limits of your Internet connection.If you live in the city, the chances are that there are dozens and dozens of wireless networks in your vicinity, all broadcasting with all their might and negatively affecting everyone else’s download and upload speeds. But when you have a whole room full of loud teenagers, pandemonium breaks out. When there’s just the two of them, they can hear each other loud and clear. Other wireless networks: Imagine that your wireless router is a teenager who loudly and perhaps slightly obnoxiously talks with another teenager, the WiFi module in your laptop or smartphone. While some obstacles can be easily avoided with some planning and preparation, other obstacles are immovable. The thicker and less penetrable the obstacle, the greater the impact on the strength of your signal.
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