Which of the following is true about Wide Area Networks (WANs)?

Wide Area Networks (WANs) are designed to connect individual Local Area Networks (LANs) that are spread across large geographic areas. This capability allows different LANs, which are usually confined to smaller locations like a single building or campus, to communicate with each other even if they are hundreds or thousands of miles apart. WANs use various communication technologies including leased lines, satellite links, and the Internet, enabling extensive networking across regions, countries, or continents.

The other statements do not accurately describe WANs. For instance, WANs are not limited to a single building; that characteristic is specific to LANs. Additionally, while it is true that some WANs may lack security measures, many WANs implement robust security protocols to protect data in transit, making it incorrect to label them as typically unsecured. Lastly, WANs are fundamentally different from LANs, as LANs focus on local connections whereas WANs are aimed at broader connectivity across extensive distances.