Which statement correctly describes IP (Internet Protocol)?

• A. Acronym for 'Internet Protocol'; a network-layer protocol enabling routing of packets.
• B. A protocol used for secure email transmission.
• C. A protocol that ensures data integrity at the transport layer.
• D. A hardware addressing standard.

Answer: (A)

IP is the Internet Protocol, a network-layer protocol that enables routing of packets between hosts across interconnected networks. It provides logical addressing through IP addresses, allowing routers to determine the best path to forward each packet. IP operates in two main forms, IPv4 and IPv6, and delivers packets from source to destination, but it does so on a best-effort basis and does not guarantee delivery, order, or error checking—those duties are handled by higher-layer protocols like TCP or security protocols like IPsec/TLS. It is not a protocol for secure email transmission, not a mechanism that ensures data integrity at the transport layer (that role belongs to TCP or similar transport-layer features), and it is not a hardware addressing standard (MAC addresses are used at the data-link layer). In short, IP’s primary function is routing and logical addressing at the network layer, enabling packets to move across networks.