Top-Down Network Design Third Edition Priscilla Oppenheimer Priscilla Oppenheimer Cisco Press 800 East 96th Street Indianapolis‚ IN 46240 ii Top-Down Network Design Top-Down Network Design‚ Third Edition Priscilla Oppenheimer Copyright© 2011 Cisco Systems‚ Inc. Published by: Cisco Press 800 East 96th Street Indianapolis‚ IN 46240 USA All rights reserved. No part of this book may be reproduced or transmitted in any form or by any means‚ electronic or mechanical‚ including photocopying
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available in the model • entities and attributes of entities. • relationships between entities. • diagrammatic notation. Prof P Sreenivasa Kumar Department of CS&E‚ IITM 2 Entities Entity - a thing (animate or inanimate) of independent physical or conceptual existence and distinguishable. In the University database context‚ an individual student‚ faculty member‚ a class room‚ a course are entities. Entity Set or Entity TypeCollection of entities all having the same properties. Student entity
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Online Auction System Use Case and Misuse Case Diagrams Mounika Challagundla‚ Graduate Student Dr. Natarajan Meghanathan‚ Associate Professor Department of Computer Science Jackson State University‚ Jackson‚ MS 39217‚ USA use case description • Registration: Anyone who want to participate in auction first they have to register to the system. • Login: The user will provide login details in order to access anything. • Post items: Once registered as a seller‚ the seller can start posting his
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Overview * Purpose Translate the logical description of data into the technical specifications of storing and retrieving data. * Goal Create a design for storing data that will provide adequate performance and ensure database integrity‚ security and recoverability. Basically‚ the primary goal of physical database design is data processing efficiency. * Physical Design Process Inputs such as normalized relations and estimation of their volume; definitions of each attributes; expectations
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Computer Networks NETWORKING CONCEPTS Network A network is basically an interconnection of various points to make a connected system e.g Road‚ Telephone‚ Social Data Network A computer network therefore refers to an interconnection of computers and other peripherals by use of a communication link Peer to Peer Networks In a peer-to-peer network‚ all computers are considered equal; they all have the same abilities to use the resources available on the network. Peer-to-peer networks are designed
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Topologies and Network Technology NTC/361 Monday‚ August 8‚ 2011 Thomas Krawczyk Topologies and network technology In every project‚ it is important to have a goal‚ and that goal should be the foundation on which a project team spring into action. The foundation should involve an infrastructural plan‚ and the usability of the components of the infrastructure. A project plan‚ as in any other plan‚ should outline the premise of the project and answer some basic questions like why
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Networking Programme: BSc Information Systems Case Study: Network Design for China Steel Ltd Table of Contents Introduction 3 Network Diagrams 3 Inter-Site Connections (WANS) 3 Leased Line 4 Circuit Switching 4 ISDN 4 Packet Switching 5 MPLS 5 VPN (Remote Access) 6 Inner-Site Connections (LANS) 6 Physical & Data Link Protocols 6 LAN Hardware Requirements 7 Layer 3 Protocols 8
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potential from the average value. Phase - Is a position of a point in time on a waveform cycle. Bit time - the time it takes for one bit to be ejected from a Network Interface Card at a standard speed. Encoding scheme - used by computers to represent data as characters. unshielded twisted-pair (UTP) - Copper wiring used in small-to-large networks to connect host devices to hubs and switches. Core - the central part of an optical fiber that provides the transmission region for an optical signal.
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IS IT LOGIC OR ILLOGIC? Applying Deductive Reasoning In the case of deductive reasoning – the goal is to produce a sound argument. A deductive argument in sound if the reasoning is valid (meaning the form is correct) and the premises are true. Syllogisms Grouped into three categories – categorical‚ disjunctive‚ hypothetical Categorical Syllogisms whether things belong or do not The major premise and minor premise and conclusion express things that categorize things Proceeds from a general
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mywbut.com Data Flow Diagrams (DFDs) 1 mywbut.com Specific Instructional Objectives At the end of this lesson the student will be able to: • • • Identify the activities carried out during the structured analysis phase. Explain what a DFD is. Explain why constructing DFDs are important in arriving at a good software design. • Explain what a data dictionary is. • Explain the importance of data dictionary. • Identify whether a DFD is balanced. Structured Analysis Structured analysis
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