Electronics and Communication Engineering - Satellite Communication - Discussion

Discussion :: Satellite Communication - Section 1 (Q.No.26)

26. 

In a stop-and-wait ARQ system, the transmitting terminal

[A]. waits for positive or negative acknowled-gement from the receiving terminal after sending a block
[B]. sends another block if positive acknowledge is received through ACK character
[C]. resends the previous block if negative acknowledgement is received through a NAK character
[D]. does not wait for acknowledgement after sending a block

Answer: Option D

Explanation:

No answer description available for this question.

Chander Kala said: (Sep 11, 2014)  
This answer is wrong right is [A]. Stop and wait ARQ waits for positive or negative ACK from the receiving terminal if ACK is positive then after send a next block and ACK is negative re-transmit the same block.

Yogita said: (Oct 15, 2015)  
I agree with the same answer should be A.

Rupak said: (Mar 13, 2016)  
Yes answer should be A.

Sandeep Kaur said: (Aug 22, 2016)  
The answer should be A.

Chetna said: (Sep 17, 2016)  
A stop-and-wait ARQ sender sends one frame at a time; it is a special case of the general sliding window protocol with both transmit and receive window sizes equal to 1 and more than one respectively. After sending each frame, the sender doesn't send any further frames until it receives an acknowledgement (ACK) signal. After receiving a good frame, the receiver sends an ACK. If the ACK does not reach the sender before a certain time, known as the timeout, the sender sends the same frame again.

So, the answer should be A.

Aadesh said: (Nov 26, 2016)  
The Answer is A because A stop-and-wait ARQ sender sends one frame at a time, After sending each frame, the sender doesn't send any further frames until it receives an acknowledgement (ACK) signal.

Rubi Fiza said: (Mar 3, 2017)  
Yes, the answer must be A. The transmitter waits for the positive and negative acknowledgement after sending the block.

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