Slot time & SIFS for IEEE 802.11 a/b/g/n/ac

802.11a @ 5 GHz
slot time = 9 us, SIFS = 16 us

802.11b @ 2.4 GHz
slot time = 20 us, SIFS = 10 us

802.11g @ 2.4 GHz
slot time = 9 us, SIFS = 10 us

802.11n
@ 2.4 GHz
slot time = 9 us(short) or 20 us(long), SIFS = 10 us
@ 5 GHz
slot time = 9 us, SIFS = 16 us

802.11ac @ 5 GHz
slot time = 9 us, SIFS = 16 us