A wide area network (WAN) is a remote network that connects local area networks (LANs) or metropolitan area networks (MANs) in different areas for communication purposes. It is typically used to interconnect campus networks or data center networks.

The statement provides an accurate and standard definition of a Wide Area Network (WAN). A WAN is fundamentally a network that spans a large geographical area, often crossing metropolitan, regional, or national boundaries. Its primary purpose is to provide long-distance connectivity, interconnecting geographically separate networks such as Local Area Networks (LANs), Metropolitan Area Networks (MANs), and by extension, specific large-scale LAN implementations like campus networks and data center networks. The use cases mentioned—interconnecting campus and data center networks—are typical enterprise applications for WAN technologies.

This is a "TRUE OR FALSE" question; therefore, there is no incorrect option to evaluate. The provided statement is factually correct.

1. Huawei HCIA-Datacom V1.0 Training Material. In the module covering fundamental network concepts, a WAN is defined by its large geographical scope and its function of connecting other networks like LANs. The material states, "A WAN provides long-distance communication and covers a wide range of areas, such as a country or a continent... A WAN is mainly used to connect LANs in different regions." (HCIA-Datacom V1.0 Training Material, Chapter 1: Data Communication and Network Basics).

2. Kurose, J. F., & Ross, K. W. (2021). Computer Networking: A Top-Down Approach (8th ed.). Pearson. This foundational university textbook defines network types by scale. In Chapter 1, it distinguishes between LANs and WANs, stating, "A wide area network (WAN) [...] typically spans tens or hundreds of kilometers. [...] Enterprises often use WANs to connect their geographically distributed offices." This aligns with the statement's description of connecting LANs/MANs in different areas. (Chapter 1, Section 1.2: The Network Edge).

3. Stallings, W. (2014). Data and Computer Communications (10th ed.). Pearson. This academic text provides a clear definition: "A wide area network (WAN) covers a large geographical area. A WAN typically consists of a number of interconnected switching nodes. [...] These nodes and the networks they support (which are typically LANs at subscriber sites) are connected by transmission lines." This confirms the role of a WAN in interconnecting LANs. (Chapter 1, Section 1.4: Wide Area Networks).