What is the difference with long and short preamble?
Every packet is sent with a preamble, which is just a known pattern of bits at the beginning of the packet so that the receiver can sync up and be ready for the real data. This preamble must be sent at the basic rate (1 Mbps), according to the official standard. But there are two different kinds of preambles, short and long. The long preamble has a field size of 128 bits, while the short preamble is only 56 bits.
