Explanation : A local-area network (LAN) is a computer
network that spans a relatively small
area. Most often, a LAN is confined to a
single room (with any brand of computer),
building or group of buildings; however,
one LAN can be connected to other LANs
over any distance via telephone lines and
radio waves. The acronym ISP is 'internet
service provider'. It provides services for
accessing, using, or participating in the
internet.