A static allocation may refer to any of the following:
1. With computer memory, static allocation is a section set aside for an application when it is first loaded. This section of memory is used for one specific application at a time. It is made available again once that application is closed.
2. With a network or network device, static allocation or a static IP address assigns a fixed address. For example, assigning a computer a fixed IP address of 192.168.123.114 never changes unless done so manually. This address is designated by the user and not the network.
Assigning a computer a static IP address that's incompatible with the netmask or your network configuration prevents the computer from communicating properly with the network.