I'm really confused about 802.11n.
802.11n provides support for dual band (2.4 & 5 GHz), is much faster, and gives greater range, since it uses MIMO technology (
multi antenna multiple radio chains), but my questions are these:
I heard that it can provide many options since it's dual-band. So, does it give me all the options for transmitting the Wi-Fi signals either using 2.4 or 5GHz or both of them together? If yes,
If I have a device whose wireless card doesn't support 802.11n, and I connect to the N router, will it affect the speed of the whole network since the network will have to use legacy compatibility techniques?
If I have an 802.11n wireless card and the other one (as I mentioned) doesn't support N, and both computers are connected to the router. Will the N computer have the full speed that 802.11n provides for?
What are the effects if I set the router for dual-band operation rather than using just one frequency? Is it the same power and performance as if I had chosen single-band operation?
I heard that 802.11n supports legacy compatibility (a,b,g) and the speed will be decreased over all the network when you connect it to another router that uses the old standard (a or g). Does this it only happen when you connect it to a router or it will be decreased even when you have one router but with an old computer that doesn't do 802.11n connected to it?