Technology in Action Alan Evans Kendall Martin Mary Anne Poatsy Twelfth Edition

Technology in Action Chapter 12 Behind the Scenes: Networking and Security in the Business World

Client/Server Networks and Topologies Client/Server Network Basics Servers and Network Topologies Copyright © 2016 Pearson Education, Inc. 12-2

Client/Server Network Basics Objectives 1.What are the advantages of a business network? 2.How does a client/server network differ from a peer-to-peer network? 3.What are the different classifications of client/server networks? 4.What components are needed to construct a client/server network? Copyright © 2016 Pearson Education, Inc. 12-3

Servers and Network Topologies Objectives 5.What do the various types of servers do? 6.What are the various network topologies, and why is network topology important in planning a network? Copyright © 2016 Pearson Education, Inc. 12-4

Basics of Client/Server Networks A network is a group of two or more computing devices (nodes) Configured to share information and resources  Printers, files, and databases Businesses gain advantages from deploying networks Copyright © 2016 Pearson Education, Inc. 12-5

Client/Server Networks Basics Networking Advantages Copyright © 2016 Pearson Education, Inc. 12-6

Client/Server Networks Basics Types of Client/Server Networks Copyright © 2016 Pearson Education, Inc. 12-7

Client/Server Networks Basics Key Components Copyright © 2016 Pearson Education, Inc. 12-8

Servers Major Categories of Servers Copyright © 2016 Pearson Education, Inc. 12-9

Network Topologies Physical: layout of the “real” components of the network Logical: virtual connections among network nodes  Determined by protocols instead of physical layout or paths that signals follow Network protocols Copyright © 2016 Pearson Education, Inc

Network Topologies Bus Topology Copyright © 2016 Pearson Education, Inc

Network Topologies Ring Topology Copyright © 2016 Pearson Education, Inc

Network Topologies Star Topology Copyright © 2016 Pearson Education, Inc

Setting Up Business Networks Transmission Media Network Adapters and Network Navigation Devices Network Operating Systems Client/Server Network Security Copyright © 2016 Pearson Education, Inc

Transmission Media Objective 7.What types of transmission media are used in client/server networks? Copyright © 2016 Pearson Education, Inc

Network Adapters and Network Navigation Devices Objectives 8.How do network adapters enable computers to participate in a client/server network? 9.What devices assist in moving data around a client/server network? Copyright © 2016 Pearson Education, Inc

Network Operating Systems Objective 10.What software needs to run on computers attached to a client/server network, and how does this software control network communications? Copyright © 2016 Pearson Education, Inc

Client/Server Network Security Objective 11.What measures are employed to keep large networks secure? Copyright © 2016 Pearson Education, Inc

Transmission Media Wired Transmission Media Six factors need to be considered  Maximum run length  Bandwidth  Bend radius (flexibility)  Cable cost  Installation cost  Interference Copyright © 2016 Pearson Education, Inc

Transmission Media Twisted-Pair Cable (a)Unshielded twisted-pair (UTP) cable (b)Shielded twisted-pair (STP) cable Copyright © 2016 Pearson Education, Inc

Transmission Media Coaxial Cable Coaxial cable in business networks  Not as popular, but still used when there is heavy electrical interference Copyright © 2016 Pearson Education, Inc

Transmission Media Fiber-Optic Cable Anatomy Copyright © 2016 Pearson Education, Inc

Transmission Media Wireless Media Options Wireless media options  Most businesses use the same Ethernet standards as home networks  Wireless access points provide coverage wherever portable devices will be used Copyright © 2016 Pearson Education, Inc

Network Adapters Network adapters: Three critical functions:  Generate high-power signals for network transmissions  Break data into packets  Act as gatekeepers for information flowing to and from client computer Copyright © 2016 Pearson Education, Inc

Network Adapters What Do Network Adapters Do? Copyright © 2016 Pearson Education, Inc

Client/Server Network Security Physical Protection Measures Copyright © 2016 Pearson Education, Inc

Client/Server Network Security Firewalls Copyright © 2016 Pearson Education, Inc

Check Your Understanding 1.What are the advantages of a business network? 2.How does a client/server network differ from a peer-to-peer network? 3.What are the different classifications of client/server networks? 4.What components are needed to construct a client/server network? Copyright © 2016 Pearson Education, Inc

Check Your Understanding 5.What do the various types of servers do? 6.What are the various network topologies, and why is network topology important in planning a network? 7.What types of transmission media are used in client/server networks? 8.How do network adapters enable computers to participate in a client/server network? Copyright © 2016 Pearson Education, Inc

Check Your Understanding 9.What devices assist in moving data around a client/server network? 10.What software needs to run on computers attached to a client/server network, and how does this software control network communications? 11.What measures are employed to keep large networks secure? Copyright © 2016 Pearson Education, Inc

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of the publisher. Printed in the United States of America. Copyright © 2016 Pearson Education, Inc.