LAN and WAN
The more I study about computer network, the more I am getting counfused about basic concept of LAN and WAN.
So, I am going to take this good opportunity and try to cofirm my knowledge again by defining its difference.
LAN: It is a high-speed data network that covers a relatively small geographic area. It typically connects workstations, personal computers, printers, servers, and other devices. LANs offer computer users many advantages, including shared access to devices and applications, file exchange between connected users, and communication between users via electronic mail and other applications.
WAN: It is a data communications network that covers a relatively broad geographic area and that often uses transmission facilities provided by common carriers, such as telephone companies. WAN technologies generally function at the lower three layers of the OSI (Open System Interface) reference model; the physical layer(the 1st layer), the data link layer(the 2nd layer), and the network layer(the 3rd layer).
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So, now you can figure out which technology does the "Dial-up service" belong to between LAN and WAN !!! |