NETWORK TERMINOLOGIES And DATA RATE AND BAUD RATE



BASIC NETWORK TERMINOLOGIES

vDATA
vDATA RATE
vBAUD RATE
vPEAK DATA RATE

vBURSTY DATA



DATA:

CAME FROM LATIN WORD DATUM
COLLECTION OF FACTS AND FIGURES
ANY THING IN RAW FORM (BEFORE PROCESSING)
COMMANDS AND DECESION MAKING STUFF IS NOT DATA

(processed data is called information)






DATA RATE

THE SPEED AT WHICH TELECOME DEVICES OPRATE DIGITAL INFORMATION.
NO. OF BITS PROCESSED PER UNIT TIME.
NO. OF BITS TRANSFERRED PER UNIT TIME ON A COMUNICATION MEDIA.

UNIT IS BIT/SECOND OR bps b/s







Baud Rate

Unit to measure analog signal.
Usually 1 Baud= 1 bit/sec.
But it is not always the case.
Typically its no. of symbols per second.
One Baud can deliver multiple bits.


Peak Data Rate

Throughput: is average rate of success of message delivery over communication channel.
Message have to pass many nodes to reach to destination. Some time its single attempt successful. sometimes many.
When throughput is maximum data rate is called peak data rate.
Peak data rate occur just for moment and not always remains same.





Bursty Data

High bandwidth transition over a short period of time
Popular in military radio signaling to minimize the chance of being detected by other.
Channel is almost full during bursty data.








Networking Topology

Arrangement of different elements of a network, e.g. links nodes cables.
Network structure can be depicted physically or logically.
Physical topology is placement of components of network
Logical topology is how data flow in network
Both can be same or different.
Or
logical topology is how devices appear connected to the user




Example 1: 
In a network physically shaped as a linear bus, the data travels along the length of the cable. Therefore, the network has both a physical bus topology and a logical bus topology.


Example 2: 
A physical topology in the shape of a star, in which cable segments connect all computers to a central hub, can have a logical ring topology if signal actually travels around in a circle from one port to the next.


 it is not always possible to predict how data travels in a network simply by observing its physical layout.




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