Computer Science Engineering (CSE) Exam > Computer Science Engineering (CSE) Questions > A Go-Back-N ARQ uses a window of size 15. How...
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A Go-Back-N ARQ uses a window of size 15. How many bits are needed to define the sequence number?
- a)15
- b)4
- c)16
- d)5
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
A Go-Back-N ARQ uses a window of size 15. How many bits are needed to ...
Formula:
Window size (Go Back N) = 2n-1
Where n is bits needed
So, 15 = 2n-1
16 = 2n
So, n = 4
Window size (Go Back N) = 2n-1
Where n is bits needed
So, 15 = 2n-1
16 = 2n
So, n = 4
Most Upvoted Answer
A Go-Back-N ARQ uses a window of size 15. How many bits are needed to ...
Explanation:
Go-Back-N ARQ is a protocol used in data communication to ensure data integrity and reliability. It is a type of automatic repeat request (ARQ) protocol. In this protocol, the sender sends a window of packets to the receiver without waiting for an acknowledgement for each packet. The receiver sends an acknowledgement for the packets received successfully.
Sequence number:
The sequence number is used to identify the packets sent by the sender. It is used by the receiver to detect and discard duplicate packets. In Go-Back-N ARQ, the sequence number is used to identify the packets in the window.
Window size:
The window size is the number of packets that can be sent by the sender without waiting for an acknowledgement. In Go-Back-N ARQ, the window size is fixed.
Calculation:
In Go-Back-N ARQ, the sequence number is used to identify the packets in the window. The window size is 15, so the sequence numbers range from 0 to 14.
To represent a range of 15 numbers, we need at least 4 bits. This is because 2^4 = 16, which is greater than 15. Therefore, we need 4 bits to represent the sequence number.
Answer:
Hence, the correct answer is option B, i.e., 4 bits.
Go-Back-N ARQ is a protocol used in data communication to ensure data integrity and reliability. It is a type of automatic repeat request (ARQ) protocol. In this protocol, the sender sends a window of packets to the receiver without waiting for an acknowledgement for each packet. The receiver sends an acknowledgement for the packets received successfully.
Sequence number:
The sequence number is used to identify the packets sent by the sender. It is used by the receiver to detect and discard duplicate packets. In Go-Back-N ARQ, the sequence number is used to identify the packets in the window.
Window size:
The window size is the number of packets that can be sent by the sender without waiting for an acknowledgement. In Go-Back-N ARQ, the window size is fixed.
Calculation:
In Go-Back-N ARQ, the sequence number is used to identify the packets in the window. The window size is 15, so the sequence numbers range from 0 to 14.
To represent a range of 15 numbers, we need at least 4 bits. This is because 2^4 = 16, which is greater than 15. Therefore, we need 4 bits to represent the sequence number.
Answer:
Hence, the correct answer is option B, i.e., 4 bits.
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A Go-Back-N ARQ uses a window of size 15. How many bits are needed to define the sequence number?a)15b)4c)16d)5Correct answer is option 'B'. Can you explain this answer? for Computer Science Engineering (CSE) 2025 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about A Go-Back-N ARQ uses a window of size 15. How many bits are needed to define the sequence number?a)15b)4c)16d)5Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A Go-Back-N ARQ uses a window of size 15. How many bits are needed to define the sequence number?a)15b)4c)16d)5Correct answer is option 'B'. Can you explain this answer?.
A Go-Back-N ARQ uses a window of size 15. How many bits are needed to define the sequence number?a)15b)4c)16d)5Correct answer is option 'B'. Can you explain this answer? for Computer Science Engineering (CSE) 2025 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about A Go-Back-N ARQ uses a window of size 15. How many bits are needed to define the sequence number?a)15b)4c)16d)5Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A Go-Back-N ARQ uses a window of size 15. How many bits are needed to define the sequence number?a)15b)4c)16d)5Correct answer is option 'B'. Can you explain this answer?.
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