A company is looking to upgrade its wireless infrastructure to improve the network's speed and range within their office space. The current routers only support up to the 802.11g standard. Which wireless standard should they upgrade to for the best increase in speed and range considering modern devices?
Remain on 802.11g, as it is sufficient for most office applications.
Switch to 802.11a to prioritize range over speed.
Upgrade to 802.11n for a moderate increase in speed and range.
Revert to 802.11b to improve compatibility with older devices.
Upgrade to 802.11ac for the best increase in speed and range.