13. Suppose a 1-Gbps point-to-point link is being set up between the Earth and a new lunar colony. The distance from the moon to the Earth is approximately 385,000 km, and data travels over the link at the speed of light-3 × 108 m/s. (a) Calculate the minimum RTT for the link. (b) Using the RTT as the delay, calculate the delay x bandwidth product for the link. (c) What is the significance of the delay x bandwidth product computed in (b)? (d) A camera on the lunar base takes pictures of the Earth and saves them in digital format to disk. Suppose Mission Control on Earth wishes to download the most current image, which is 25 MB. What is the minimum amount of time that will elapse between when the request for the data goes out and

13. Suppose a 1-Gbps point-to-point link is being set up between the Earth and a new lunar colony. The distance from the moon to the Earth is approximately 385,000 km, and data travels over the link at the speed of light-3 × 108 m/s. (a) Calculate the minimum RTT for the link. (b) Using the RTT as the delay, calculate the delay x bandwidth product for the link. (c) What is the significance of the delay x bandwidth product computed in (b)? (d) A camera on the lunar base takes pictures of the Earth and saves them in digital format to disk. Suppose Mission Control on Earth wishes to download the most current image, which is 25 MB. What is the minimum amount of time that will elapse between when the request for the data goes out and

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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Concept explainers

Network transmission cabling

A network is a collection of devices connected by communication links. A device can be a computer or any instrument capable of sending and receiving data or information formed by other nodes toward the network. A channel that connects people or things is known as a network. It sends the data from one place to another. It is the basic concept of a computer, network, and data communications.

Question

13. Suppose a 1-Gbps point-to-point link is being set up between the
Earth and a new lunar colony. The distance from the moon to the
Earth is approximately 385,000 km, and data travels over the link
at the speed of light-3 × 108 m/s.
(a) Calculate the minimum RTT for the link.
(b) Using the RTT as the delay, calculate the delay x bandwidth
product for the link.
(c) What is the significance of the delay x bandwidth product
computed in (b)?
(d) A camera on the lunar base takes pictures of the Earth and
saves them in digital format to disk. Suppose Mission Control
on Earth wishes to download the most current image, which
is 25 MB. What is the minimum amount of time that will
elapse between when the request for the data
the transfer is finished?
goes out and

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