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

Describe benefits of effective communication, Question: (a) Explain the...

Question: (a) Explain the following terms: Information Communication Technology, Operating System and Application Software. (b) Define what a computer is, give four anatomi

Elliptic curve encryption - decryption scheme, (a) (i) If m = p·q·r where...

(a) (i) If m = p·q·r where p, q, and r are prime numbers, what is Φ(m)? (ii) Therefore, Determine Φ(440). (b) Describe the following terms as used in cryptography: (i)

Using Technology as Experience Framework, Write a two to three (2-3) page p...

Write a two to three (2-3) page paper in which you: Explain how the Web user interfaces help donors to make decisions. Relate the emotional thread demonstrated in the case study to

Ip datagrams, on LAN,where are IP datagrams transported?

on LAN,where are IP datagrams transported?

Define network, A Network is described as a system for connecting compu...

A Network is described as a system for connecting computers using a single transmission technology. The computers can interact with each other in a network. They can receive an

Firewalls-information security, Firewalls A firewall in an information s...

Firewalls A firewall in an information security program that prevents specific types of information from moving between the outside world and the inside world. The firewall may

Explain how inter-vlan communication, QUESTION a) A switch basically ...

QUESTION a) A switch basically operates by forwarding frames from one part of the network to another, based on MAC address. Describe the three types of switching namely store

Uc, every time i connect to WIFI the UC goes directly to 100% then i doesn'...

every time i connect to WIFI the UC goes directly to 100% then i doesn''t want to come down. what shall i do ?

Provide the network configuration, QUESTION: a) Below is a capture of a...

QUESTION: a) Below is a capture of an Ethernet II frame which has an IPv4 packet and a segment. Provide the source MAC address in hexadecimal; the source IP address, the length

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