Remember when Wi-Fi wireless Internet seemed like magic? Not so
much these days, partly because our wireless networks are often
too slow to handle the volume of videos and music we download.
Gear makers are responding with a generation of routers that
deliver a massive speed boost to the computers, phones, game
consoles, and other devices that connect wirelessly to the
Internet. The only question is whether the extra speediness is
worth the additional cost. As is often the case, the answer is:
It depends.  If you think Wi-Fi is a goofy name, the
technology’s real name is worse — IEEE 802.11. Behind these
numbers you find more letters that identify the version of Wi-Fi
that you use. Most of us now rely on 802.11 B, G, or N routers.
The new standard is called AC, like the famous brand of spark
plugs. Good choice of name, because an AC router will give your
home network quite a jolt.  Up to now, the N routers were the
fastest available, capable of transmitting and receiving data at
up to 450 million bits per sec