Yes. Each computer on one network must have a different IP Address, in order to be able to communicate.
No, an IP address is given to each internet provider, not each computer. For example, there could be five computers hooked up to the same network in which case they'd all have the same IP address.
An iPod can only be synced to one iTunes Library at a time (each computer has a different library). This means that, if you want to change the computer you manage your iPod with, it will need to be re-synced to the computer in question. To do this, connect your iPod to the computer you'd rather manage your iPod on. A popup from iTunes will say something along the lines of "This iPod is currently synced to a different Library. Would you like you sync this iPod to this Library instead?" Click Yes. After that, all the previous information from your other computer's iTunes Library will be erased and replaced with everything that you just synced your iPod with. From there, you can freely sync your iPod with that computer as you normally would.
Yes, it does.
Yes. Each computer connected to the internet is assigned a unique internet protocol, or IP, address.
EVERY IP address is unique to each computer. Each IP address only relates to one computer (or network such as a school). Even though there may be a whole network of computers connected to one IP address, each computer in that network still has its own unique identifier.
IP address of each computer on a LAN has to be different to avoid confusion.
Each packet carries the address of the intended recipient. Each computer has a unique address. It works rather like the postal system.
I'm guessing you mean on the same network as another IP address, right? If so, you would have to have a wireless router program on your computer to see what computers are currently on. Each computer has a different IP address.
have an unique IP address
Internet Protocol I believe