What does the acronym DNS stand for?

The correct choice is "Domain Name System." DNS is a fundamental component of the internet's functionality, serving as the system that translates human-friendly domain names (like www.example.com) into IP addresses that computers use to identify each other on the network. This process allows users to access websites using easily memorable names rather than numerical IP addresses, making the internet more user-friendly.

The concept of DNS is crucial in network management and web services, enabling efficient communication and connection across the internet. Without DNS, users would have to remember complex numerical addresses to reach their desired websites, significantly complicating navigation.

The other options refer to various networking and security concepts but do not accurately reflect what DNS stands for. For instance, Dynamic Network Security may imply methods for protecting networks. Still, it is unrelated to the role of DNS in domain name resolution. Similarly, Data Network Service and Distributed Network System pertain to different aspects of networking and do not describe the DNS function or its purpose within the internet ecosystem.