A proxy server
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The answer & explanation for this question is given in the attachment below.
I would say D, Arranging for microphones.
Answer: second option: Operating system...
An operating system is the most important software that runs on a computer. It manages the computer's memory and processes, as well as all of its software and hardware. It also allows you to communicate with the computer without knowing how to speak the computer's language.
Hope this helps... Stay safe and have a Merry Christmas!!!!!!! :D
Answer:
C: IP addresses provide a unique number for identifying devices that send and receive information on the internet.
Explanation:
Computers connected to the Internet must speak the "Internet language" called the "Internet Protocol" or simply "IP." Each computer is assigned a unique address somewhat similar to a street address or telephone number. Under the current system there are four numbers that range from 0 to 255 Every computer, whether it functions as a web site, is being used by a web surfer, is a mail server, and/or is used for any other function, has an IP address so it can communicate across the Internet. Communication is accomplished by sending pieces of information called "packets" that include the IP address of the destination computer. The Domain Name System (often called DNS) is the system where the IP addresses are converted into names. When www.consumer.net is entered by a user into a browser a (somewhat hidden) process converts that name into 206.156.18.122. This allows the user to connect to the proper web site and usually involves a domain registration service that is funded by domain name fees.