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Communication Using a Network

Posted By:Shashi Ray       Posted Date: April 13, 2010    Points: 25    Category: General    URL: http://www.dotnetspark.com  

Communication Using a Network


n       The main components of data communication are sender, receiver, medium and message

n       The data to be sent is converted into signals and then transmitted over the network

n       Signaling techniques are of two types - broadband and baseband

n       Baseband signals transmit data at a single frequency

n       Broadband technique can transmit data using more than one frequency



n       Network Interface Cards are devices that are used to get connected to different computers on a network

n       Some examples of NIC are Ethernet Card and Token Ring Card

n       Ethernet cards support transfer rate of 10 or 100 or 1000 Mbps

n       MAC address is a hardware address that is embedded onto the NIC

n       Lower layers of OSI model identify nodes on the network by their MAC address



n       A connection established between two nodes by directly connecting a cable is known as direct cable connection.

n       Signals lying on the cable are absorbed by the terminators at the end of the cable to avoid collision.

n       Cross over cables can be used for temporary connection between two devices when  switch or hub is not present.

n       Volt-ohm meters is a cable-testing tool which is used to troubleshoot the network cabling.



n       Volt-ohm meter is used to measures voltage and resistance and to check the continuity of a cable.

n       Tone generator and probe is another troubleshooting tool which has the ability to identify wires, finding open circuits and short circuits, diagnosing crosstalk and other telecom tasks



Shashi Ray

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