cross cable
A switch is typically used to connect multiple computers in a single residential unit to a modem.
The Ethernet port is used to connect a computer to a connectivity device such as a modem, router, switch,etc. Does so via an ethernet cable.
Ethernet
No. A modem is used for dial up.
CAT5
A switch or hub is used to connect multiple devices to a modem. Hubs have largely fallen out of use due to their bandwidth-sharing properties that make them undesirable in high-speed local networks.
An Arris cable modem can be used to connect ones home entertainment system to cable, internet, and telephone. One can also set up a wireless access point in their home with a wireless modem.
A firewire or corssover cable can be used to connect any two computers that have these ports. However, a telephone modem can only be used to connect a computer to the internet.
Staright
To connect a modem to a phone port, a standard telephone cable, often referred to as an RJ-11 cable, is used. The connectors on each end of the cable are RJ-11 connectors, which fit into the phone port on the wall and the modem. This type of connection is typically used for DSL modems that utilize existing telephone lines for internet service.
Crossover Cable (T568A on one end, T568B on the other)
A broadband router modem is a device used to help connect a computer to the internet. You can buy it from a store or a service provider and connect the Ethernet cable to your computer.