Define parity bit, Computer Network Security

Assignment Help:

PARITY BIT:

A parity bit is an extra bit transmitted with data item select to give the resulting bit odd or even parity. For example an even parity data packet 10100001 has parity bit 1 as it has odd number of 1's. An odd parity data packet 10010111 has parity bit 0 as it has odd number of 1's.

Let us take another example, if noise or other interference produces an error one of the bits in the data will be modified from a 1 to a 0 or from a 0 to a 1. Thus the parity of giving bits will be large.

Suppose original parity and data is 10100001+1 (even parity). After interference the incorrect data is 10101001+1 and it has convert an odd parity.

LIMITATIONS OF PARITY CHECKING:

Parity can only check errors that modify in odd number of bits for example the parity and original data is 10100001+1 (even parity) and the incorrect data is 10101011+1 (even parity). We can see that even no. of bits have been modified due to noise so parity checking could not check this error. Parity generally is used to check on bit error.

ALTERNATIVE ERROR DETECTION METHODES:

In addition to parity checking alternative error detection functions have been produced. These functions differ from each other by the following respects.

  • The size of the additional data information (transmission overhead)
  • Calculates complexity of the algorithm (computational overhead)
  • The number of bits errors that can be checked (how well errors are detected )

 


Related Discussions:- Define parity bit

Network simplex method, QUESTION: (a) Briefly explain the steps invol...

QUESTION: (a) Briefly explain the steps involved in Network Simplex Method. (b) What data structures you would expect in the Network Simplex Method. Show the data struct

Locality of reference , LOCALITY OF REFERENCE PRINCIPLE:  Principle of...

LOCALITY OF REFERENCE PRINCIPLE:  Principle of "Locality of Reference" use to predict computer interaction patterns. There are two patterns shown as follows: a) Spatial loca

What do you understand by demilitarized zone, Problem 1: What does the ...

Problem 1: What does the SNMP access policy show? SNMP community diagram SNMP access policy Problem 2: Does there exist any formal functional specificat

Object tracking using wireless sensor networks, This project involves the d...

This project involves the design and development of a simulation environment of many sensors tagging material/ machinery/equipment/etc in a warehouse site to help monitor and manag

Need assignemnt help in information security assignemnt, Need Assignemnt he...

Need Assignemnt help in Information security assignemnt

Http request message, Question (a) Consider that you enter the subsequent ...

Question (a) Consider that you enter the subsequent URL in the address bar of a popular web client and that both the server and client accepts HTTP version 1.1. i. What can be

Lan topologies, Network can be distinguished by shape. According to which t...

Network can be distinguished by shape. According to which there are three most popular methodologies, which are shown as follows; Star Ring Bus

Venn Diagram Problem, Students were asked about search engine they used.90 ...

Students were asked about search engine they used.90 of them said they used google chrome,70 used Internet Explorer,40 used Mozilla Firefox,30 used Google Chrome and Internet Explo

Application layer protocol, Problem a) Give the destination IP address, up...

Problem a) Give the destination IP address, upper layer protocol, TTL in decimal and header checksum in hexadecimal; the source port number and the destination port number in deci

Identify possible controls-information security, Identify Possible Controls...

Identify Possible Controls For each threat and linked vulnerabilities which have residual risk, create primary list of control ideas. Residual risk is the risk which remains to

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd