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Network Interface Cards ELET – 5320 By Devender Kasturi What is NIC? A NIC or Network Interface Card is a circuit board or chip, which allows the computer to communicate with other computers on a Network.

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what is nic
What is NIC?
  • A NIC or Network Interface Card is a circuit board or chip, which allows the computer to communicate with other computers on a Network.
  • Networks transmit data in Serial format to and computer communicates with parallel data. NIC takes care of serial to parallel data conversion and vice versa.

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types
Types
  • Most NICs are designed for a particular type of network, protocol, and media, although some can serve multiple networks.
    • Ethernet ( 10 – 100 Mbps)
    • Token ring (4 – 16 Mbps)
    • FDDI (100 Mbps)

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types of connectors
Types of Connectors.
  • BNC
    • The BNC connector is a round connector which is used for Thinnet or 10Base-2 Local Area Network.
  • DB9 (RJ45 JACK)
    • Used with Token Ring networks.
  • DB15
    • The DB15 connector is used for a Thicknet or 10Base-5 Local area network.

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slide5
RJ45
    • One of the most popular types of connections used with computer networks.
    • RJ45 looks similar to a phone connector or RJ11 connector however is slightly larger.
  • LED
    • Indicates if the network connection is properly established

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nic functions
NIC Functions
  • NIC converts data from serial to parallel and vice versa
  • NIC cards organize bits into orderly collections called packets. NIC cards check packets for errors or incompletion.
  • NIC acts as a gatekeeper; permitting incoming communications aimed only at its computer to pass through the interface and on to the CPU.

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special purpose nics
Special-Purpose NICs
  • Some devices require special adapters to be purchased in order to achieve network connectivity.
  • Wireless Adapters
    • Some of the components that might be included with this type of card are:
      • Indoor antenna and antenna cabling
      • Software to enable the adapter to work with a particular network environment.
      • Diagnostic software to check initial installation or to troubleshoot thereafter

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special purpose nics8
Special Purpose NICs
  • Remote Boot Adapter
    • Because diskless workstations have no storage space, they require special adapters that contain enough information to start the computer and access the network to download operating system software.
    • One of the biggest advantages offered by remote boot adapters is cost.

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advantages
Advantages
  • Convenience
    • User is not required to initiate network connection
  • Power Management
    • e.g stand by mode
  • Faster Registration Time
    • System could be connected to the network while its being started
  • Intelligent Switching
    • Can coexist with other network adaptors

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advantages10
Advantages
  • Simultaneous Communication with device
    • while data is still being passed using the device, NIC can simultaneously monitor data traffic, connection status, signal monitoring, and so on.

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references
References
  • http://www.sierrawireless.com/pub/doc/2130212.pdf
  • http://som.csudh.edu/rharris/docs/IMchap04.doc
  • http://www.webopedia.com/TERM/N/network_interface_card_NIC.html

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