Stop and Wait

Stop and Wait
  1. A transmitter transmits the frame.
  2. Transmitter wait for the acknowledgement for fixed period of time.
  3. On receiving valid frame, receiver send back an acknowledgement for next frame.
  4. On receiving acknowledgement transmitter transmit next frame.
  5. If sender not received any acknowledgement within time duration it re-transmit the same frame.
  6. The rate of transmission depends on the processing power of the receiver.
Example of Stop and Wait protocol.

Frame Sender
Frame Receiver
Frame(0) transmitted
Acknowledgement Frame(1)
Frame(1) transmitted
Acknowledgement Frame(2)
Frame(2) transmitted
No Acknowledgement within time
Frame(2) re-transmitted
Acknowledgement Frame(3)

This method is ineffective when the size of the frame is large.

What if the size of the frame is large?
  1. The transmitter divides large messages into smaller frames.
  2. Then transmit these smaller frames.
More topics from Computer Network to read.
Computer Network
EasyExamNotes.com covered following topics in Computer Network.
  1. Data Link Layer
  2. Framing
  3. Byte count framing method
  4. Flag bytes with byte stuffing framing method
  5. Flag bits with bit stuffing framing method
  6. Physical layer coding violations framing method
  7. Error control in data link layer
  8. Stop and Wait scheme
  9. Sliding Window Protocol
  10. One bit sliding window protocol
  11. A protocol Using Go-Back-N
  12. Selective repeat protocol
  13. Application layer
References:
  1. Andrew S. Tanenbaum, David J. Wetherall, “Computer Networks” Pearson Education.
  2. Douglas E Comer, “Internetworking with TCP/IP Principles, Protocols, And Architecture", Pearson Education
  3. Kaveh Pahlavan, Prashant Krishnamurthy, “Networking Fundamentals”, Wiley Publication.
  4. Ying-Dar Lin, Ren-Hung Hwang, Fred Baker, “Computer Networks: An Open Source Approach”, McGraw Hill.
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EasyExamNotes.com covered following topics in these notes.

Practicals:
Previous years solved papers:
A list of Video lectures References:
  1. Sebesta,”Concept of programming Language”, Pearson Edu 
  2. Louden, “Programming Languages: Principles & Practices” , Cengage Learning 
  3. Tucker, “Programming Languages: Principles and paradigms “, Tata McGraw –Hill. 
  4. E Horowitz, "Programming Languages", 2nd Edition, Addison Wesley

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    Computer Organization and Architecture 

    EasyExamNotes.com covered following topics in these notes.

    1. Structure of desktop computers
    2. Logic gates
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    6. Register transfer language
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    9. Arrays in Assembly Language Programming

    References:

    1. William stalling ,“Computer Architecture and Organization” PHI
    2. Morris Mano , “Computer System Organization ”PHI

    Computer Network ↓ 👆
    Computer Network

    EasyExamNotes.com covered following topics in these notes.
    1. Data Link Layer
    2. Framing
    3. Byte count framing method
    4. Flag bytes with byte stuffing framing method
    5. Flag bits with bit stuffing framing method
    6. Physical layer coding violations framing method
    7. Error control in data link layer
    8. Stop and Wait scheme
    9. Sliding Window Protocol
    10. One bit sliding window protocol
    11. A protocol Using Go-Back-N
    12. Selective repeat protocol
    13. Application layer
    References:
    1. Andrew S. Tanenbaum, David J. Wetherall, “Computer Networks” Pearson Education.
    2. Douglas E Comer, “Internetworking with TCP/IP Principles, Protocols, And Architecture",Pearson Education
    3. KavehPahlavan, Prashant Krishnamurthy, “Networking Fundamentals”, Wiley Publication.
    4. Ying-Dar Lin, Ren-Hung Hwang, Fred Baker, “Computer Networks: An Open Source Approach”, McGraw Hill.