Which statement about DNS hierarchy is true?

Which statement about DNS hierarchy is true?

• A. It serves to distribute management of domain name data across multiple servers.
• B. It stores all DNS records in a single centralized server.
• C. It translates IP addresses into MAC addresses for local networks.
• D. It requires no servers to function.

Answer: (A)

DNS uses a hierarchical structure to distribute management of domain name data across multiple servers. This design places root servers at the top, directing queries to the appropriate top-level domain (TLD) servers, which then delegate to authoritative servers for individual domains. By spreading responsibility across many servers, the system scales to the entire Internet, balances load, and provides redundancy—so no single server holds every record. Recursive resolvers can cache responses to speed up repeated lookups, but the data itself is stored across a network of delegated zones. In contrast, translating IP addresses to MAC addresses is handled by ARP for local networks, and DNS inherently relies on servers (root, TLD, and authoritative) to function.

DNS uses a hierarchical structure to distribute management of domain name data across multiple servers. This design places root servers at the top, directing queries to the appropriate top-level domain (TLD) servers, which then delegate to authoritative servers for individual domains. By spreading responsibility across many servers, the system scales to the entire Internet, balances load, and provides redundancy—so no single server holds every record. Recursive resolvers can cache responses to speed up repeated lookups, but the data itself is stored across a network of delegated zones. In contrast, translating IP addresses to MAC addresses is handled by ARP for local networks, and DNS inherently relies on servers (root, TLD, and authoritative) to function.