Which organization is responsible for IP address allocation, domain name management, and protocol identifiers?

• A. IANA
• B. ISO
• C. ISOC
• D. IEEE

Answer: (A)

The central control of global identifiers and the DNS root is handled by IANA, the Internet Assigned Numbers Authority. It allocates IP address space to the regional Internet registries, which then distribute addresses to ISPs and organizations, keeping the global address space unique. It also manages the DNS root zone, coordinating with root servers so every domain lookup starts from a consistent worldwide root. In addition, IANA maintains registries for protocol identifiers, such as the numbers assigned to various Internet protocols and the ports used by services, ensuring these identifiers are standardized and unique. While other organizations like ISO, ISOC, and IEEE have important roles in standards and Internet development, IANA is the one responsible for IP address allocation, domain name management, and protocol identifiers.