The operating system manages all the CPU, disc drives, establish a user interface, execute and provide services for applications software, printers, etc...
An Internet Protocol address (IP address) is a numerical label assigned to each device connected to a computer network that uses the Internet Protocol for communication. An IP address serves two principal functions: host or network interface identification and location addressing.
Your IP address is assigned by local network devices or your ISP(Internet Service Provider), and therefore will change.