Which of the following refers to an organized, curated collection of digital resources—such as e-books, academic journals, and multimedia—managed with cataloging metadata to facilitate systematic search and retrieval?

### Why this is right The deciding feature is a curated collection of digital materials organized with descriptive information so users can find specific resources. E-books, journals, and multimedia fit that description when they are cataloged and managed as a collection. ### The concept A **digital library** is an organized collection of materials stored in digital form, such as electronic books, journal articles, images, or recordings. **Cataloging metadata** is information that describes each item, such as its title, author, subject, or publication date. A library’s search tools use this information to help users locate and retrieve relevant items. A digital library is therefore more than a place where files happen to be stored: its resources are selected or managed as a collection and described so they can be found. | Term | Main purpose | |---|---| | Digital library | Organizes and provides access to a described collection of digital resources | | Content delivery network | Delivers copies of online content from servers chosen to speed up access | | Search engine crawler | Automatically visits web pages so a search engine can discover and index them | | File transfer protocol | Provides rules for transferring files between computers | ### The other options - **B. Content delivery network**: A content delivery network distributes content through servers to speed up delivery. It may deliver library materials, but it does not itself describe an organized collection for users to search. - **C. Search engine crawler**: A crawler is software that visits web pages to help a search engine build its index. It gathers information; it is not the curated collection users search. - **D. File transfer protocol**: This is a set of rules for transferring files between computers. It can move digital resources, but it does not catalog or organize them as a library. ### Terms - **Digital resource**: An item in digital form, such as an electronic book, article, image, or recording. - **Cataloging metadata**: Descriptive information attached to an item so it can be organized and found. - **Retrieval**: Finding and accessing a particular item from a collection. - **Content delivery network**: A network of servers that stores and delivers content to users, often to improve loading speed. - **Search engine crawler**: Automated software that visits web pages and gathers information for a search engine’s index. - **File transfer protocol**: A set of rules that allows files to be sent between computers. ### Remember A digital library organizes and describes resources for discovery; a delivery network speeds up access, a crawler gathers web information, and a transfer protocol moves files.