Cables carry the electrical signals necessary to transfer data from one system to another.
Computer cables are often made of copper.
its a port to insert usb gadgets or cables to connect them to your pc. for example the ipod charging cable(used to either charge or to syncronize your ipod)
pc,cables,hub,
Yes, If you have a Monitor and the cables to go with it, the cables can attach to the TV screen and you'll have a PC on a TV. But not on DVD, but the TV itself.
No you cant. I tried it and it didn't work. Sorry, pal.
To transport power & or data.
Peripherals
You can't using telephone cables. Telephone cables use 4 wires, but none of the wires are twisted, so there will be problems with crosstalk. Also, telephone cables use an incorrect connector (RJ-11) for a NIC card in a PC, which needs RJ-45 connectors.
Yes as long as you have the right cords or cables.
Ethernet
rubber
To interconnect devices of same Port specifications (Same Fabric). For e.g. PC to PC, Switch to Switch.