anna university results 2012

Hi Friends here is latest information related with Anna University Coimbatore Results 2012. Anna University Coimbatore Results 2012 will be announced. Anna University Coimbatore Results 2012 can easily be downloaded from following links. It is very easy to see Anna University Coimbatore Results 2012. Yes guys Anna University Coimbatore Results 2012 announced soon. You can see your Anna University Coimbatore Results 2012 here. Just feed your roll no. here and get your Anna University Coimbatore Results 2012. Best Of Luck Friends !!! 

welcome to watch anna university results click the below link:

anna university results 2012 coimbatore,

http://www.autcbe.ac.in//university_results.aspx

anna university results 2012 chennai :

http://www.annauniv.edu/

COMPUTER NETWORKS QUESTIONS AND ANSWERS - II

21. Write short notes on VRC.        

The most common and least expensive mechanism for error detection is the vertical redundancy check (VRC) often called a parity check. In this technique a redundant bit called a parity bit, is appended to every data unit so, that the total number of 0’s in the unit (including the parity bit) becomes even.

22. Write short notes on LRC.

In longitudinal redundancy check (LRC), a block of bits is divided into rows and a redundant row of bits is added to the whole block.

23. Write short notes on CRC.

The third and most powerful of the redundancy checking techniques is the cyclic redundancy checks (CRC) CRC is based on binary division. Here a sequence of redundant bits, called the CRC remainder is appended to the end of data unit.

24. Write short notes on CRC checker.

A CRC checker functions exactly like a generator. After receiving the data appended with the CRC it does the same modulo-2 division. If the remainder is all 0’s the CRC is dropped and the data accepted. Otherwise, the received stream of bits is discarded and the dates are resent.