Cyclic redundancy check (crc), Computer Network Security

Assignment Help:

CYCLIC REDUNDANCY CHECK (CRC)

To activate a network system to check move error without increasing the amount of information in every packet another most successful method is made which is named CRC.

To understand the functions of CRC consider data in a packet as co-efficient of a polynomial. Their co-efficient set is divided by a given polynomial. The remainder of this division is then transferred as checked and CRC at the receiver to check errors. CRC has good error detection properties. It is easy to understand in hardware.

HARDWARE COMPONENTS USED IN CRC:

CRC needs just two hardware elements:

  • Shift register
  • Exclusive OR ( XOR unit )

The XOR unit is given in the figure below.

 

1913_CRC.png

 

Shift register is also given in figure. It operates two operations.

  • Initialize: puts all bits to zero
  • Shift: replaced all bits to the left position.

 

 

1331_CYCLIC REDUNDANCY CHECK.png


Related Discussions:- Cyclic redundancy check (crc)

Define broadcasting , Broadcasting is the distribution of video and audio...

Broadcasting is the distribution of video and audio content to a whole audience via any audio or visual mass communications medium, but generally one using electromagnetic radiat

What is network virtual terminal, Network Virtual Terminal It is a set...

Network Virtual Terminal It is a set of principles describing a very simple virtual terminal interaction. The NVT is needed in the start of a Telnet session. Communication wit

Explain security, W h a t do you understand by the terms security, netwo...

W h a t do you understand by the terms security, network security and information security? How network security and information security are connected? Security can be def

What is an autonomous system, QUESTION 1: a) Differentiate between a r...

QUESTION 1: a) Differentiate between a routing protocol and a routed protocol. b) Describe any three design goals of Routing protocols. c) Lists some of the features shared

Data compression and the transport services, Da t a compre s sion a...

Da t a compre s sion and the trans p ort s e rvices,   The main purpose of the transport layer is to provide services which are efficient, reliable and cost-effecti

Explain the usage of digital signature, a) Explain the contents of the Cost...

a) Explain the contents of the Cost Assessment. b) Various Documents are needed for Configuration Management. State three of them, and describe their importance. c) Given tha

Token ring, TOKEN RING Many LAN methods that are ring topology need to...

TOKEN RING Many LAN methods that are ring topology need token passing for synchronized access to the ring. The ring itself is acts as a single shared communication phase. Both

Cost benefit analysis (cba)-information security, Cost Benefit Analysis (CB...

Cost Benefit Analysis (CBA) The common approach for information security controls is economic feasibility of implementation. CBA is begun by evaluating the worth of assets which

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

on LAN,where are IP datagrams transported?

Draw a suitable physical network diagram, Question a) From the capture ...

Question a) From the capture below: Give the datagram source IP address, upper layer protocol, Total length in decimal and header checksum in hexadecimal; the segment source po

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