If you are using a mix of N and "legacy", i.e. 802.11a, b or g, clients connected to an N router, you will see slower speeds from all types of clients.
But you will experience reduced performance only when N and "legacy" clients are transmitting at the same time when associated with the same radio.
If the N router has two radios, you will see the slowdown only when mixed clients are associated with the same radio. If N clients are associated with one radio and legacy clients are associated to the other radio, you won't see reduced performance.
The reason is that when N clients are much faster than the older clients. So when both are used, N clients must slow down to allow time for the slower clients to communicate. And because the "air time" (bandwidth) is being shared, the slower clients will also not communicate at top speed.
See Add, Don't Replace When Upgrading to 802.11n for more info.
But you will experience reduced performance only when N and "legacy" clients are transmitting at the same time when associated with the same radio.
If the N router has two radios, you will see the slowdown only when mixed clients are associated with the same radio. If N clients are associated with one radio and legacy clients are associated to the other radio, you won't see reduced performance.
The reason is that when N clients are much faster than the older clients. So when both are used, N clients must slow down to allow time for the slower clients to communicate. And because the "air time" (bandwidth) is being shared, the slower clients will also not communicate at top speed.
See Add, Don't Replace When Upgrading to 802.11n for more info.
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