This document discusses the stop-and-wait protocol. It provides flow control by allowing only one frame to be transmitted at a time before waiting for an acknowledgment. However, it does not provide error control. The key aspects are: 1. It is used for unidirectional data transmission over noiseless channels. 2. It only allows one frame to be transmitted at a time before waiting for an acknowledgment, providing flow control but no error control. 3. A disadvantage is that if a frame is lost or corrupted, both the sender and receiver will be stuck indefinitely waiting.

1. STOP-AND-WAIT
PROTOCOL
VENKATA SREERAM

2. Stop & Wait Protocol
Learning Agenda for this Seminar
1
2
3
Understanding the working of
simple stop-and-wait Protocol
Understanding the problems
with stop-and-wait Protocol
And some other concepts too...

3. Types of Protocols
Noiseless Channels Noisy Channels
Simplest
Stop and Wait
Selective Repeat ARQ
Go-Back-N ARQ
Stop and wait ARQ

4. Stop and wait Protocol is data link
layer protocol for transmission of
frames over noiseless channels.
It provides Undirectional data
Transmission with flow control
facilities. but, without wrror control
facilities.
The idea of stop-and-wait protocol
is straight protocol.
After Transmitting one frame , the
sender waits for an
Acknowledgement before
transmiting the next frame.
Stop & wait

5. Primitives of stop-and-wait Protocol
Send one
Data Packet
at a Time
1
Send the next
packet only
after receiving
ACK from the
Previous
2
Receive and
consume
Data Packet
1
After
consuming
packets, ACK
need to be sent
( Flow Control )
2
Sender Side Receiver Side
Rules for Transmission the Data

6. www.venkatasreeram.live
Protocol
The sender has to wait for the
Acknowledgement from the receiver
before sending another Data.
At a time only one Data Packet have
to be shared from the Sender

7. Problems
Suddenly, if the data has broken
during the Passing, the Receiver
was not able to receive the data.
The Receiver was in WAIT situation
& has been waiting for the Data at
infinite time
The sender was in STOP situation,
since the sender doesn't received
any acknowledgement from the
receiver.
So, If any Data broken - that might
be a big problem in this Protocol Disadvantages

9. It is a data-link layer protocol which is used for
transmitting the data over the noiseless
channels. It provides unidirectional data
transmission which means that either sending
or receiving of data will take place at a time. It
provides flow-control mechanism but does
not provide any error control mechanism.
stop-and-wait

10. LEARNING GOES ON...
THANK YOU