The correct answer is: A. Domain name system (DNS)
A domain name system (DNS) is a hierarchical naming system for computers, services, or any resource connected to the Internet or a private network. It associates various information with domain names assigned to each of the participants. Most prominently, it translates easily memorized domain names to the numerical IP addresses needed for locating and identifying computer services and devices with the underlying network protocols. By translating domain names into IP addresses, the Domain Name System makes it possible for users to locate resources using names instead of numbers.
The Domain Name System is a distributed database. This means that it is not stored in one central location, but rather on many different servers around the world. When you enter a domain name into your web browser, your computer sends a request to a DNS server. The DNS server then looks up the IP address for that domain name and sends it back to your computer. Your computer then uses that IP address to connect to the website.
The Domain Name System is an essential part of the Internet. It allows users to access websites and other resources using easy-to-remember names, instead of having to remember long and complex IP addresses.
The other options are incorrect because:
- Option B, Domain numbering system, is not a real term.
- Option C, Packet-switching domain system, is a term that is used to describe a type of network architecture. However, it is not the system that converts an IP address into an easy to remember format.
- Option D, Domains, is a general term that can refer to a variety of things, including websites, email addresses, and even entire networks. However, it is not the system that converts an IP address into an easy to remember format.