Final answer:
The location of a file is specified by its file path, which is unique in the computer's file system and not to be confused with file extension or file type.
Step-by-step explanation:
The location of a file is specified by its file path. The file path is a string of characters that defines the unique location of a file in a computer's file system. Unlike the file extension, which indicates the file type or the program associated with it, or the file type, which describes the kind of data contained in the file, the file path points to where the file is stored within the directory structure of the storage device. Domain is usually associated with internet addresses and is not relevant in the context of specifying a file location on a storage device.