please also provide detaile explanation to the formula.
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
please also provide detaile explanation to the formula.
Transcribed Image Text:Question 1:
Suppose users share a 2.4 Mbps link. Also suppose each user requires 300 kbps when
transmitting.
a) When circuit switching is used, how many simultaneous users can be supported over the
2.4 Mbps link?
b) Suppose now that packet switching is used over the 2.4 Mbps link, that each user requires
450 kbps when transmitting, and that there are 21 users in total. Each user transmits with a
10% probability. Find the probability that at any given time instant, 4 or more users are
transmitting simultaneously.
Expert Solution
Step 1
a) Number of users over 2.4 Mbps link is=transmission rate of the link used by user/transmission rate required by each user
=2.4/300
=2400/300(as 1 Mbps=106 bps)
=8 users
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