In Sniffer Mode, there are the transitions from
Sniffer(Channel i) to Sniffer (Channel j). It needs to
change from Ch1 to Ch2 to Ch 3 and so on until the
Ch11 to detect the rogue access point on all possible
channels. So the total time of switching from Normal
Mode to Sniffer Mode and back to Normal Mode is
equal to 4.25 + (6 x 11) + 74 = 144.25 second.