Question: An 802.11 network may use four different interframe spaces (IFSs) to delay the transmission of a frame in different situations. This allows low-priority traffic to

An 802.11 network may use four different interframe spaces (IFSs) to delay the transmission of a frame in different situations. This allows low-priority traffic to wait for high-priority traffic when the channel becomes idle. Normally, four different IFSs are used in different implementations, as shown in Figure 15.26. Explain the purpose of these IFSs (you may need to do some research using the Internet).

Figure 15.26

Figure 15.26 Problem P15-21 Delay period SIFS: Short interframe space EIFS PIFS: PCF interframe space DIFS DIFS: DCF interframe space PIFS EIFS: Extended interframe space SIFS Busy Time Idle Contention window

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