Assume that TCP implements an extension that allows window sizes much larger than 64 KB. Suppose that you are using this extended TCP over a 1- Gbps link with a latency of 50 ms to transfer a 10-MB file, and the TCP receive window is 1 MB. If TCP sends 1-KB packets (assuming no congestion and no lost packets): (a) How many RTTS does it take until slow start opens the send window to 1 MB? (b) How many RTTS does it take to send the file? (c) If the time to send the file is given by the number of required RTTS multiplied by the link latency, what is the effective throughput for the transfer? What percentage of the link bandwidth is utilized?

Assume that TCP implements an extension that allows window sizes much larger than 64 KB. Suppose that you are using this extended TCP over a 1- Gbps link with a latency of 50 ms to transfer a 10-MB file, and the TCP receive window is 1 MB. If TCP sends 1-KB packets (assuming no congestion and no lost packets): (a) How many RTTS does it take until slow start opens the send window to 1 MB? (b) How many RTTS does it take to send the file? (c) If the time to send the file is given by the number of required RTTS multiplied by the link latency, what is the effective throughput for the transfer? What percentage of the link bandwidth is utilized?

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Assume that TCP implements an
extension that allows window sizes
much larger than 64 KB. Suppose that
you are using this extended TCP over a 1-
Gbps link with a latency of 50 ms to
transfer a 10-MB file, and the TCP receive
window is 1 MB. If TCP sends 1-KB
packets (assuming no congestion and no
lost packets):
(a) How many RTTS does it take until
slow start opens the send window to 1
MB?
(b) How many RTTS does it take to send
the file?
(c) If the time to send the file is given by
the number of required RTTS multiplied
by the link latency, what is the effective
throughput for the transfer? What
percentage of the link bandwidth is
utilized?

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