Suppose a 128-Kbps point-to-point link is set up between Earth and a rover on Mars. The distance from Earth to Mars (when they are closest together) is approx- imately 55 Gm, and data travels over the link at the speed of light-3 × 108 m/s. (a) Calculate the minimum RTT for the link. (b) Calculate the delay x bandwidth product for the link. (c) A camera on the rover takes pictures of its surroundings and sends these to Earth. How quickly after a picture is taken can it reach Mission Control on Earth? Assume that each image is 5 Mb in size.

Suppose a 128-Kbps point-to-point link is set up between Earth and a rover on Mars. The distance from Earth to Mars (when they are closest together) is approx- imately 55 Gm, and data travels over the link at the speed of light-3 × 108 m/s. (a) Calculate the minimum RTT for the link. (b) Calculate the delay x bandwidth product for the link. (c) A camera on the rover takes pictures of its surroundings and sends these to Earth. How quickly after a picture is taken can it reach Mission Control on Earth? Assume that each image is 5 Mb in size.

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

Suppose a 128-Kbps point-to-point link is set up between Earth and a rover on
Mars. The distance from Earth to Mars (when they are closest together) is approx-
imately 55 Gm, and data travels over the link at the speed of light-3 × 108 m/s.
(a) Calculate the minimum RTT for the link.
(b) Calculate the delay x bandwidth product for the link.
(c) A camera on the rover takes pictures of its surroundings and sends these to
Earth. How quickly after a picture is taken can it reach Mission Control on
Earth? Assume that each image is 5 Mb in size.

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