A DSL modem is a small box which contains several ports. The cable stretching from the wall to the DSL modem is a standard telephone cable. Not all computers are equipped with NICs. NICs are, however, inexpensive and available at most electronics stores. Many new computers ship from the manufacturer with NICs pre-installed.
Static addresses are permanent addresses.
They are usually associated with computers that host services which rely on a permanent address, such as Web servers and mail servers. Dynamic addresses change each time the computer connects to the Internet Service Provider. Computers which connect to the ISP over modems with regular phone lines usually use this type of address. Sticky addresses share properties of both static and dynamic addresses. If the address is still available, then the ISP assigns it to the computer making the request.