Typically you would use a CAT-5e or CAT-6 UTP (Unshielded Twisted Pair) network cable.
You need a crossover cable for that.
To connect a PC to a switch you should use a straight through UTP cable.
To connect two devices of the same type together. e.g. You would use a crossover cable to connect a router to another router, a switch to another switch or a computer to another computer. If you are connecting diferent devices together, such as a router to a switch, a straight through cable should be used.
straight-through cable
An U.S.B cable.
crossover cable
CAT5
Yes, you do need cables to connect your computer to your television. You can also use the guide to find out about what type of cable that you need to connect the computer to the television.
Straight Cable is used to connect a device to a different type of devices Eg: PC to a Switch PC to a Hub Switch to a Router E.t.c. Cross Cable is used to connect a device to a similar type of devices Eg: PC to PC Switch to Switch E.t.c.
with RJ 45 conecter & unshilded twisted pair cable
cat5,cat5e $ cat6
In ethernet terms, a straight-through cable connects a client device to a hub, switch or router (straight-through meaning the connection is pin-to-pin, the opposite of a cross-over cable, which connects RX-TX and vice-versa).