What is a WAN, and how does it differ from a LAN?

A WAN, or Wide Area Network, is designed to connect multiple Local Area Networks (LANs) over a broad geographical area, which can span cities, countries, or even continents. This connection enables different networks to communicate with each other, facilitating data exchange and resource sharing across vast distances.

In contrast, a LAN is typically confined to a smaller geographic area, such as a single building or campus, and is used for local networking. By interlinking various LANs, a WAN provides a broader networking capability, allowing organizations to integrate their operations across multiple locations.

The other choices do not accurately reflect the characteristics of a WAN. While a WAN certainly utilizes telecommunication lines to maintain connections between LANs, it is not limited to local networking, as that pertains specifically to LANs. Additionally, the assertion that WANs operate without telecommunication lines is incorrect since they rely on such infrastructure. Moreover, while WANs can facilitate high-speed data transmission, they are not necessarily the fastest type of network available, as speed can vary based on numerous factors, including the specific technologies employed and the distances involved. Thus, the choice highlighting the WAN's function in connecting multiple LANs clearly defines its purpose and distinguishes it from other network types.