Get a high speed hub.
The front automatic hub from your 2001 Xterra will fit on your 2000 model Xterra. The front automatic of's are exactly the same.
No. That is, if you're referring to the newer internally-geared 7-speed hubs from Shimano (Nexus) and SRAM (S7). Both of these have seven internal gear ratios (like the old 3-speeds on steroids) and a coaster brake. They are installed using a single chainring at the cranks and a single rear cog. So no derailleurs needed. BTW, the Nexus (or its sibling the Alfine) hub from Shimano has been made in 4, 7, 8 and 11 ratios.
With great difficulty. For a bunch of reasons auto geared bicycles aren't well liked by riders, who'll most want to know when the gear change is about to happen. There's an old internally geared 2-speed hub by Bendix, there's a strange contraption with spinning counterweights hooked up to the hub and gearing mechanism and there's a high-end Shimano "comfort" bicycle with electronic shifting that can be set to automatic. But that's about it, and neither has been much of a success. If you're asking about bikes with engines, then the easiest thing to do is to sell your current one and buy one with an automatic transmission instead.
No a hub will not speed up your connection, your connection is based on the ISP. A hub sends the information to every computer on the network until it finds the computer that sent the request.
Rotor hub links the blades to the low-speed shaft
The Generic USB Hub is a HI-SPEED USB device and will function at reduced speed when plugged into a non-HI-SPEED port
No, replace the entire hub.
First find out what type of hub you have, it'll be printed on the hub somewhere. Then just do a net search for "shifter" + hub name and 3 speed.
sure, but the autos are pain , most mess up, all the time.
in the hub
Alot of work and alot of money...