Which term describes a network service that allows devices to communicate using unique addresses?

Which term describes a network service that allows devices to communicate using unique addresses?

• A. IP
• B. URL
• C. DNS
• D. SSH

Answer: (A)

The main concept is how devices on a network identify and reach each other using addresses. The term that fits is IP, the Internet Protocol. It provides unique addresses to devices and defines how data packets are addressed and routed from one device to another across networks. Each packet carries a destination IP address so routers know where to send it, and a source IP address so replies can return. This addressing mechanism, available in IPv4 and IPv6 forms, is what enables global communication between devices. URLs and DNS deal with finding resources by name rather than identifying devices themselves. A URL points to a resource, often using a domain name, while DNS translates that name to the underlying IP address. SSH uses IP addresses to establish a connection, but it is an application-layer protocol, not the addressing system itself.

The main concept is how devices on a network identify and reach each other using addresses. The term that fits is IP, the Internet Protocol. It provides unique addresses to devices and defines how data packets are addressed and routed from one device to another across networks. Each packet carries a destination IP address so routers know where to send it, and a source IP address so replies can return. This addressing mechanism, available in IPv4 and IPv6 forms, is what enables global communication between devices.

URLs and DNS deal with finding resources by name rather than identifying devices themselves. A URL points to a resource, often using a domain name, while DNS translates that name to the underlying IP address. SSH uses IP addresses to establish a connection, but it is an application-layer protocol, not the addressing system itself.