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It’s a group of computers and associated devices that share a common communications line and typically share the resources of a single processor or server within a small geographic area (for example, within an office building).
A local area network may serve as few as two or three users (for example, in a home network) or many as thousands of users (for example, in an FDDI network).
IEEE 802.3: Ethernet is the most widely-installed local area network (LAN) protocol. Specified in a standard, IEEE 802.3, Ethernet was originally developed by Xerox and then developed further by Xerox, DEC, and Intel. An Ethernet LAN typically uses coaxial cable or special grades of twisted pair wires.
10BASE-T: The most commonly installed Ethernet systems are called 10BASE-T and provide transmission speeds up to 10 Mbit/s. Devices are connected to the cable and compete for access using a Carrier Sense Multiple Access with Collision Detection (CSMA/CD) protocol.
A token ring network is a local area network (LAN) in which all computers are connected in a ring or star topology and a binary digit- or token-passing scheme is used in order to prevent the collision of data between two computers that want to send messages at the same time.
In data communications, a hub is a place of convergence where data arrives from one or more directions and is forwarded out in one or more other directions. A hub usually includes a switch of some kind. See USB 7-Port Hub To connect several USB devices
On the Internet, a router is a device or, in some cases, software in a computer, that determines the next network point to which a concept of packet should be forwarded toward its destination. See 4-Port Cable/DSL Router
Typically, a suite of application programs can be kept on the LAN server. Users who need an application frequently can download it once and then run it from their local hard disk. Users can order printing and other services as needed through applications run on the LAN server. Read and write access is maintained by a LAN administrator.
A LAN server may also be used as a Web server if safeguards are taken to secure internal applications and data from outside access.
NOS - Network Operating System Artisoft's LANtastic, Banyan VINES, Novell's NetWare, and Microsoft's LAN ManagerNetware, MS NT Server One thing comes through loud and clear in the year 2000 State of the VAR Market survey data about network operating systems (NOS). The NOS race seems to be over. Windows has won, and Netware is slowly just going away.