Which of the following protocols is used to resolve an IP address to domain name?

DHCP (Dynamic Host Configuration Protocol) dynamically assigns IP addresses to clients but does not perform name-to-address or address-to-name resolution.

SMB (Server Message Block) is a file and printer sharing protocol used in Windows networks and has no role in name or address resolution.

LDAP (Lightweight Directory Access Protocol) is used to query and modify directory services such as Active Directory and does not resolve IP addresses to domain names.

DNS handles name resolution in both directions: forward lookups resolve domain names to IP addresses, and reverse lookups (using PTR records in the in-addr.arpa zone) resolve IP addresses back to domain names. It is the foundational Internet protocol for all name-to-address and address-to-name resolution.