Your computer must have an IP address, your IP address is what identifies your network. IP addresses such as telephone numbers, that uniquely identifies your device so that other devices can communicate with each other / interact. In the IP address of your network consists of 2 (two) kind, can be either static IP or dynamic IP.
Most of today our computer network using a DHCP server (Dynamic Host Configuration Protocol) to manage and assign IP addresses on a network. It is considered a dynamic IP address, because they are only temporary - after a specified time (or when you turn on your computer...