The best ones can be bought at any computer shop or electronics stores. The best brand is hard to say since it will depend on your specific needs and how you want to spend. Motorola and D-link are popular ones. Try this site: DSL-modem-review.toptenreviews.com.
You should be able to.
There are many companies that you can order a wireless broadband modem from. You can order from Rogers, Bell, Cogeco, Best Buy, Future Shop, Cisco, Dell and even Net Gear.
If you have services from cable internet and DSL services, then you will be able to use any modem for the services, as long as you choose a modem that is supported by the company you purchase services from.
Yes
Yes. In fact, this is the standard, intended way for a wireless router to work. ISP/Internet service DSL/Cable-----> Modem---->Router )))))) PC ---> Cable ))))) Wireless
Yes you can, you have to do that like following. Connect one DSL wireless modemrouter to the cable modem, and another wireless modem connect in the first wireless modemrouter. You have to understand that internet speed on the first DSL router will be rather higher then for the second one.
A router and a modem are two separate things. There are a few different modem/router combo's, but typically you will need both items.
a generous file to assimilate the encryption for dsl modem router
Use WDS (Wireless Distribution System) function of your ADSL router.
No. It is a DSL modem. This usually will accommodate one wired connection, and would require a router (wireless or otherwise) to connect multiple devices.
You can not connect a DSL modem/Router to a Cable modem the are two completely different devices. Basically one speaks English the other speaks Mandarin and neither has Rosetta Stone.
A digital subscriber line (DSL) modem is a device used to connect a computer or router to a telephone circuit that has digital subscriber line service configured.