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Multiple Choice

What is used to uniquely identify devices connected to the Internet?

IP addressing is how devices are identified and located so data can be routed across the Internet. Each device that communicates online uses an IP address to be reachable, and routers use that address to forward packets toward the correct destination. This makes the IP address the practical, global identifier that enables delivery between networks, even though a device’s actual address can change with dynamic assignment or when behind NAT. A device name is a human-friendly label used locally and doesn’t provide a unique global identity for routing. A URL identifies a specific resource (like a webpage) rather than the device itself. A gateway address is the router’s address on a local network, which helps reach other networks but doesn’t uniquely identify the device on the Internet.

IP addressing is how devices are identified and located so data can be routed across the Internet. Each device that communicates online uses an IP address to be reachable, and routers use that address to forward packets toward the correct destination. This makes the IP address the practical, global identifier that enables delivery between networks, even though a device’s actual address can change with dynamic assignment or when behind NAT.

A device name is a human-friendly label used locally and doesn’t provide a unique global identity for routing. A URL identifies a specific resource (like a webpage) rather than the device itself. A gateway address is the router’s address on a local network, which helps reach other networks but doesn’t uniquely identify the device on the Internet.