
Dial-up connections are not reliable for a business and not suitable for a LAN. Analog modems are not designed to handle the communications of a business LAN, and should be used only in the rare cases when no other technology is available.
Cable
modems connect via the cable TV network connection in a residence. By
working on a shared network (which means speed is determined by the
number of active users on the network) cable modems eliminate the
dial-in process and offer "always on connectivity". Theoretical maximum
speed is limited by the Ethernet board at 10Mbps. However, actual
maximum speed is typically 1-3Mbps. Cable connectivity suffers from
security holes and is unsuitable for hosting servers. Therefore, cable
connectivity is not a viable business solution."
ADSL is a good solution for the residential user who wants high speed
Internet connectivity but doesn't want the expense of additional phone
lines. ADSL offers high speed connections, voice and data on the same
line at the same time, a constant connection- without dialing in and
affordability.