Which characteristic distinguishes a WAN from a LAN?

• A. WANs connect devices only within a single building.
• B. WANs require no routers to operate.
• C. WANs are typically limited to campus networks.
• D. WANs typically cover broad geographic areas.

Answer: (D)

Geographic scope is what sets a wide area network apart from a local area network. A LAN serves a small, local area—like a single building or campus—often using high-speed Ethernet and owned by one organization. A WAN, on the other hand, connects sites across cities, regions, or even countries, using routers and telecom links to span large distances. That broad geographic coverage is the defining characteristic, so the statement that WANs typically cover broad geographic areas is the best fit. The other options describe traits more typical of LANs or misunderstand WAN infrastructure: a single building focus is LAN territory, WANs do rely on routers, and campus networks are considered LANs.