An IT technician is setting up a SOHO wireless router in an environment where there are already numerous other wireless networks interfering. There are reports of congestion and poor performance on networks using the 2.4GHz band. Which of the following wireless protocols should the technician employ to minimize interference and provide the fastest connection speed?
802.11n (2.4GHz)
802.11a (5GHz)
802.11ac (5GHz)
802.11g (5GHz)