What function does the Domain Name System (DNS) perform for users?

The Domain Name System (DNS) serves a crucial role in translating human-readable domain names into numerical IP addresses that computers use to identify each other on the network. This function is essential because while users prefer easily memorable domain names (like www.example.com), computers communicate using IP addresses.

The option selected, which states that DNS distinguishes between similar names, correctly highlights the importance of DNS in managing domain name uniqueness and clarity. DNS helps prevent confusion when multiple domains could sound similar or look alike, ensuring that when a user types a domain name, they are directed to the correct resource rather than possibly being misled or directed to another site with a similar name. This function of the DNS reinforces navigation and usability on the internet by mitigating issues that could arise from name ambiguity.

Other functions mentioned in the incorrect options are important in network management but do not directly pertain to the primary role of DNS. The provision of IP addresses directly does not represent the primary function of DNS, as that is more about resolution rather than direct provision. Identifying hardware addresses is related to the Address Resolution Protocol (ARP), not DNS. Lastly, managing network security protocols is outside the scope of DNS, which is more focused on resolving names than securing network communications.