So i have really meybe 'bad' provider and my router plan is 21mbps but my router recive 15 and my speedtest on pc shows that i recive only 12,60 capped is that a capped netowrk or its max speed that can reach?
You are very smart buddy! Any way to fix it?Sounds like you have a DSL connection. The speed you actually get is related to how long the telephone wires are between your house and the isp equipment and how good the quality is. The ISP will quote the best case and unlike things like cable or fiber connections you tend to not get that speed.
Where do you see the 15mbps is this a speedtest done on the router or are you looking at a speed on the wan port. The numbers on the wan port do not include some of the overhead used when the the data is converted to be sent on dsl.