A NIC ( Network Interface Card) provides the hardware interface between a computer   and a computer and a network. These days almost all new computer motherland have in built NIC.

Some NIC card are meant for wired networks while other are for wireless network. Most widely used  wired LAN technology is Ethernet. Ethernet based NIC card are available in every

electronic hardware shops.

all computer participating in network  have must have at lest one NIC. Computer can have ore than one NIC  card also  if required.

Every NIC has a 48 bit globally unique identifir called as MAC Address burned into its ROM chip. This MAC address in used to deliver Ethernet frames to a computer.

The NIC driver software passes the data between the operating system and the NIC . Latest Operating system  include different NIC driver software for almost all major NIC vendors.

What is FDDI

Fiber Distributed Data Interface (FDDI) is an expensive LAN technology that employs a pair of fibre-optic rings. One is primary ring and the second ring is used to replace the primary ring in the case of a network failure. Fibver Disytributed Data Interface (FDDI) uses fiber-optic cable and is wired in a ring topology and Fiber Distributed Data Interface (FDDI) uses token passing as its media-access method and can operate at high speeds.

The Fibrer Distributed Data Interface (FDDI) provides high-speed network backbones


that can be used to connect and extend LANs.

Likke token ring, FDDI also has error-detection and correction capabilities. In a normally operating Fiber Distributed Data Interface (FDDI) ring, the token passes by each network device fast. Ifd the token is not seen within the maximum amount of time that it takes tro circulate the largest ring, it indicates a network problem.

Fibfer-optic cable such as the cable used with Fiber Distributed Data Interface (FDDI)

can support very large volumes of data over large distances.

Fibeor Distributed Data Interface (FDDI) is an expensive technology to set up because the network devices require a special network card and also fiber-optic cabling is required, which is expensive than twisted-pair cable. Because most Fiber Distributed Data Interface (FDDI) installations use a redundant second ring, more cabling is


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