B and C. A LAN, or local area network, is usually a small collection of computers on a single network segment, with computers attached to each other through one or more switches. You can find LANs in a home, small office, or office building. A WAN, or wide area network, can encompass many network segments, routing traffic across large distances using leased lines or public telephone lines. The largest WAN in the world is the Internet. Solution B and C. A LAN, or local area network, is usually a small collection of computers on a single network segment, with computers attached to each other through one or more switches. You can find LANs in a home, small office, or office building. A WAN, or wide area network, can encompass many network segments, routing traffic across large distances using leased lines or public telephone lines. The largest WAN in the world is the Internet..