GATE CS 2015 Set 2 — Question 38
Go beyond PYQs with Success TrackerAI-powered personalised practice and doubt support. Unlimited practice on eligible plans; AI usage limits apply.MCQ+2 / -0.67MediumTCP Segment FormatTransport LayerComputer NetworksTCP Flow Control
Computer Networks → Transport Layer → TCP Flow Control
Last updated
Question
Assume that the bandwidth for a TCP connection is 1048560 bits /sec. Let be the value of RTT in milliseconds (rounded off to the nearest integer) after which the TCP window scale option is needed. Let be the maximum possible window size with window scale option. Then the values of and are
Correct answer
(C) 500 milliseconds, 65535 × 2¹⁴
Solution
Bandwidth bits/sec.
The TCP window scale option is needed when the Bandwidth-Delay Product (BDP) exceeds the maximum window size supported by the standard 16-bit window field ( bytes).
Max standard window bytes.
in bits = bits.We need
seconds = 500 ms.
So, milliseconds.The TCP window scale option allows the window size to be scaled by a factor of up to .
Maximum possible window size with scaling = .
So, .
The TCP window scale option is needed when the Bandwidth-Delay Product (BDP) exceeds the maximum window size supported by the standard 16-bit window field ( bytes).
Max standard window bytes.
in bits = bits.We need
seconds = 500 ms.
So, milliseconds.The TCP window scale option allows the window size to be scaled by a factor of up to .
Maximum possible window size with scaling = .
So, .
Continue learning with Success Tracker
A step still unclear? Work through it with support
Use Success Tracker to ask about the reasoning, then try another GATE CS question to check your understanding.
AI-powered practice· Unlimited practice on eligible plans
- PYQs with solutions
- Attempt available previous-year questions, then compare your reasoning with the worked solution. Coverage varies by stream.
- Practice that adapts
- Choose a topic, work on weaker areas and bookmark questions to revisit. Your attempts feed your progress tracking.
- AI doubt support
- Ask follow-up questions about a step or concept while practising, instead of stopping at the final answer.
Unlimited practice is available on eligible plans. Free practice and AI usage have limits; check the current plan allowances before choosing.
This page stays readable without an account. AI responses can be wrong; check them against the solution and source material.
More questions on Transport Layer
2026 Set 1 Q18With respect to a TCP connection between a client and a server, which one of the following…2026 Set 1 Q19Which of the following statements is/are true with respect to the interaction of a web browser with…2026 Set 2 Q21Consider a file of size 4 million bytes being transferred between two hosts connected via a path…2026 Set 2 Q22Which one of the following protocols may need to broadcast some of its messages?2026 Set 2 Q33If an IP network uses a subnet mask of 255.255.240.0, the maximum number of IP addresses that can…