Can someone explain IP addresses to me?

[wandy]

23. Ok try this........

Some, I'll call them "givers of IP addresses" not only must keep tract of the addresses but will not reuse an address they have given out. If using dynamic addressing you're PC doesn't OWN the IP address, it is a lease.
After an amount of time the lease must be renewed. A new address is provided. You can see this in the Windows event logs.
The "giver of addresses" should free up the old address for later use. Some do, some don't. Not a problem.

Gently shut down all attached devices.
Gently power down the "giver of addresses".
Count to 10.
Power on the "giver of addresses".
Count to 10
Power on the attached devices.

You should now see fewer IP addresses.
Do note that I didn't use when I said have fun.
Enjoy.