Cisco PLE200 Guia do Utilizador descarregar pdf (Página 144)

• Mb: megabits per second; MB: megabytes per second

• Channel width: how much radio frequency is used by a channel; the wider the

channel, the faster data can be transferred, i.e. a 40 MHz channel transfers 2x

that of a 20 MHz channel and an 80 MHz channel 4x a 20 MHz channel.

• PHY rate: speed of raw channel without the overhead of media access

protocol, i.e. Gigabit Ethernet is 1000 Mb

• Data rate: speed user data is transferred, i.e. Gigabit Ethernet is ~ 650 Mb.

There is about 35% overhead for protocol, error correction, etc. (1000 Mb PHY

rate

–

350 Mb overhead = 650 Mb data rate).

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Cisco PLE200 Guia do Utilizador Página 144