Which of the following supports commands such as open, close, append, and delete, and is commonly accessed via a drive letter, mount point, or UNC semantic?

Object Based/Content Addressable Storage stores data as immutable objects with metadata, accessed programmatically via APIs using unique identifiers, not through traditional file system commands or drive letters.

Block Level Architecture provides raw storage blocks to an operating system, which then formats them with a file system; the block storage itself does not directly handle file-level commands like open, close, or delete.

Cloud Based Storage is a general deployment model that can include various storage types (block, file, object); it is not an architecture type specifically defined by the listed file operations and access methods.

File Level Architecture, typically found in Network Attached Storage (NAS), organizes and presents data as files and directories, allowing clients to directly perform operations like open, close, append, and delete. This type of storage is commonly accessed by mapping network shares to drive letters, mounting network file systems, or using UNC paths (e.g., \\server\share).