Which of the following technologies should an administrator use to share a filesystem between servers in two distant cities?

A Storage Area Network (SAN) provides block-level access to storage, not directly a shared filesystem, and is typically optimized for high-performance within a local data center rather than direct file sharing over a WAN.

Direct Attached Storage (DAS) is storage connected directly to a single server and cannot be shared among multiple servers, especially not across distant cities.

Network Attached Storage (NAS) provides file-level data access over a network, typically using protocols like NFS or SMB/CIFS, making it suitable for sharing file systems across geographically dispersed servers via WAN links. It allows multiple servers to access the same shared files and folders.

Content Addressable Storage (CAS) is a specialized storage technology for fixed-content data, typically used for archiving, and does not provide a general-purpose shared filesystem for multiple servers.