...four values separated by periods?
YES! An Ip address is formatted as a series of four values separated by periods and each value ranges from 0 through 255!
The IP address is the Internet Protocol address, like the street address for your home or your phone number, an IP address identifies network computers. It helps traffic flow between computers because each one has its own IP address.
For your home or office network, the IP address is most likely assigned by the router... The router keeps track of every computers Network Interface Controller and maps an IP address to the NIC (Network Information Center) every time the computer joins the network. In the end, all computers have a unique IP address, and the world is safe for local networking.
The IP address assigned to your PC on a network is a local address. Similar IP addresses are used on the Internet to identify domains and other resources. Those are Internet IP addresses, separate from your local address.