What type of network architecture connects multiple offices over a large geographical area?

The correct answer is Wide-Area Network (WAN). WANs are specifically designed to connect multiple locations that are geographically dispersed, often covering large distances such as different cities or countries. This architecture facilitates communication and data transfer between various offices and sites, enabling organizations to operate seamlessly across different regions.

A WAN typically utilizes leased telecommunication lines, satellite links, or other long-distance communication facilities to provide connectivity. This characteristic distinguishes it from Local Area Networks (LANs), which are used for smaller areas, such as a single building or campus, and therefore do not support widespread connections across expansive distances.

While Software-Defined WAN and Virtual Private Network (VPN) are also related to networking, they serve different purposes. A Software-Defined WAN enhances the management and control of WANs and improves the efficiency of data transmission, but it is not a network type itself. A VPN provides secure access over the internet by encrypting data, primarily allowing remote users to access a private network securely; however, it does not inherently signify the geographical connection capability characteristic of a WAN.

Thus, WAN encompasses the necessary architecture to connect multiple offices over large geographical areas effectively.