Public Domain refers to creative materials that are not protected by laws such as copy right. Public Domain in used by lots of people
Answer:
Port number
Explanation:
Port numbers are used in the identification of a particular process for forwarding some form of network message such as the internet when it reaches a server. It is usually a 16-bit integer that is unsigned and found in header that is appended to a message unit. At the OSI transport layer, port numbers are used in searching and communicating with a specific application that is running on a host server.
Answer:
The cost of accommodating changing customer requirements is reduced
