What is a common use of DNS?

The correct answer emphasizes the primary function of the Domain Name System (DNS), which is to translate user-friendly domain names, such as www.example.com, into their corresponding numerical IP addresses, like 192.0.2.1. This translation is crucial because while humans prefer to remember names, computers identify devices on the network using numerical addresses.

The mechanism of DNS resembles a phonebook for the internet, allowing users to access websites simply by remembering domain names instead of complex numerical IP addresses. This system not only contributes to the usability of the web but also facilitates the efficient operation of network communication across the diverse range of devices and applications connected to the internet.

In contrast, the other options pertain to different aspects of network functionality and do not align with the primary purpose of DNS. For instance, bandwidth allocation is handled by network management protocols, encryption of data packets pertains to security measures like SSL or TLS, and managing user access rights involves authentication and authorization services, unrelated to the core role of DNS in resolving domain names.