Which term is described as a predictable formatting of text used to identify a resource on a network (usually the internet)?

• A. Legacy PSAP Gateway (LPG)
• B. Location to Service Translation (LoST) Protocol
• C. Uniform Resources Identifier (URI)
• D. Presence Information Data Format-Location Object (PIDF-LO)

Answer: (C)

Identifying resources on a network with a standardized text pattern is done with a Uniform Resource Identifier. A URI is a generic string that names or locates a resource on a network (often the internet). It follows a defined format that tells you how to access the resource, and it can take the form of a URL (which includes the location and access method) or a URN (a persistent name). The structure typically includes a scheme (like http or https), an authority (such as a host name), and a path, with optional query and fragment parts. For example, a URI like http://www.example.com/resource?id=123#section shows how the scheme indicates the access method, the authority identifies where the resource is, and the path and query specify the resource itself and how to retrieve it.

The other options describe different network functions rather than a universal text pattern for identifying resources. A Legacy PSAP Gateway is a component used to connect legacy 911 systems to modern networks. The LoST protocol maps a caller’s location to appropriate services and endpoints, aiding routing rather than naming resources. PIDF-LO is a data format for sharing location information related to presence services, not for identifying resources by a standardized textual pattern.