Data Link Layer

Views:
 
Category: Education
     
 

Presentation Description

For Online Photography course for beginners, join: http://www.wiziq.com/course/5247-photography-tips-for-beginners

Comments

By: kkhush.shar (31 month(s) ago)

very good slides thnku very much :)

By: ajaymalhotra (37 month(s) ago)

pls.. send that presentation ajaymalhotra500@gmail.com

By: sachinsac (51 month(s) ago)

thanks for ur kind cooperation

By: speedstardany (56 month(s) ago)

wow i got it ...... thnx yar.

Presentation Transcript

Error Detection and Correction : 

Error Detection and Correction Types of Errors Detection Correction

Slide 2: 

Types of Errors

Slide 3: 

Single-bit error

Slide 4: 

Multiple-bit error

Slide 5: 

Burst error

Slide 6: 

Redundancy

Slide 7: 

Error Detection Methods

Slide 8: 

VRC

Slide 9: 

LRC

Slide 10: 

VRC and LRC

Slide 11: 

CRC

Slide 12: 

Binary Division

Slide 13: 

Checksum

Slide 14: 

Data Unit and Checksum

Slide 15: 

EXAMPLE Sender’s Site 7 11 12 0 6 0 Sum = 36 Wrapped Sum = 6 Checksum = 9 Receiver’s Site 7 11 12 0 6 9 Sum = 45 Wrapped Sum = 15 Checksum = 0 7, 11, 12, 0, 6, 9 Packet 1 0 0 1 0 0 36 1 0 0 1 1 0 6 1 0 0 1 9 1 0 1 1 0 1 45 1 0 1 1 1 1 15 0 0 0 0 0 Details of wrapping and complementing Details of wrapping and complementing

Slide 16: 

Error Correction

Slide 17: 

Hamming Code Hamming codes can detect up to two simultaneous bit errors, and correct single-bit errors; thus, reliable communication is possible when the Hamming distance between the transmitted and received bit patterns is less than or equal to one.

Slide 18: 

Hamming Code

Slide 19: 

Hamming Code

Slide 20: 

Example of Hamming Code

Slide 21: 

Single-bit error

Slide 22: 

Error Detection