what is good web-site for information on technology for the slightly beyond basic technology person?

what im looking for is like

the differance between routers some are 1x some are 4x like how many any feet is that?

and like the differances in digital camera lenses?

computer processors,

differances in cables/ connectors that are basic and then "gold"…

ummm stuff like that. Oh and printers, like laser & inkjet…

and just stuff i should like know if i would go for a job selling technology stuff for instance…

im just trying to learn some new stuff…

thanks!