Final answer:
The statement concerning NOS centralizing resources and security and offering services like file and print services to servers is true. An NOS is designed to enable resource sharing and provide network services in a secure and organized way.
Step-by-step explanation:
The affirmation that an NOS (Network Operating System) centralizes resources and security and provides services such as file and print services to servers is true. A Network Operating System is specialized software that manages and coordinates networked computers by providing services like user management, system security, data storage, printing, internet connectivity, and other services necessary for network operation. Its main purpose is to allow for the sharing of hardware, software, and data resources among multiple users in an efficient and secure manner.