Wireless Access Point (WAP) - SEIDENBERG SCHOOL OF CSIS

Wireless Access Point (WAP) - SEIDENBERG SCHOOL OF CSIS

Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 1 Technology in Action Chapter 7 Networking: Connecting Computing Devices Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 2 Chapter Topics

Networking fundamentals Network architecture Network components Peer-to-peer networks

Ethernet networks Power-line networks Configuring software Wireless security Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 3 Networking Fundamentals Computer network Two or more computers connected together Devices connected to networks: nodes

Benefits of a network Sharing resources and peripherals Transferring files Sharing of broadband connection with use of a router Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 4 Network Architecture Network designs

Locally administered Peer-to-peer (P2P) Centrally administered Client/server Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 5 Peer-to-Peer Networks Nodes communicate with each other Peers

Share peripheral devices Common in home networks Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 6 Client/Server Networks Client computers Users who make requests Server computers

Provide resources to clients Central network control Internet A large, multiserver, multiclient network Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 7 HANs and LANs Home area network (HAN)

Connects digital devices within a home Local area network (LAN) Nodes are within a small geographic region Schools Small businesses Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 8 WANs and MANs Wide area network (WAN)

LANs connected over long distances A few miles to thousands of miles Uses telecommunications lines Metropolitan area network (MAN) Provides access within a specific geographic region, such as a city Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 9 Network Components

Transmission media Network communication devices Software Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 10 Transmission Media Provide communications channel between nodes

Forms of media Twisted pair cable Coaxial cable Fiber-optic cable Radio waves (wireless) Bandwidth Data transfer rate Throughput Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 11

Network Adapters Devices connected to or installed in nodes Network interface cards (NICs) External or internal network adapters Enable communication between nodes Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 12 Network Navigation Devices Devices that help make data flow

possible Routers Route data between networks Switches Receive data and retransmit it to nodes on the same network Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 13 Networking Software

Peer-to-peer software Built into operating systems that support networking Windows Mac OS Linux Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 14 Networking Software Client/server software

Network operating system (NOS) software Windows Server 2008 SUSE Linux Enterprise Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 15 Types of Peer-to-Peer Networks Wired Ethernet networks Wireless Ethernet networks Power-line networks

Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 16 Wired Ethernet Networks Ethernet network adapters are used to connect nodes NIC card ExpressCard USB adapter Ethernet Computers are connected to each

other using unshielded twisted pair cable Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall Phone 17 Ethernet Switches Keep track of data packets Amplify and retransmit signals Keep the network running efficiently

Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 18 Ethernet Routers Transfer packets from one network to another Home Internet routers transfer data from the Internet to the home network Allows for network-ready devices such as network

printers or network attached storage (NAS) Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 19 Wireless Ethernet Networks Ethernet networks that use radio waves instead of wires to connect nodes Based on the IEEE 802.11 standard, also known as Wi-Fi Each node requires a wireless network adapter

Transceivers Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 20 Wireless Access Point (WAP) Device added to a wireless network to extend the range of the network Must connect to either a switch, a router, or a node on the network Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall

21 Power-Line Networks Computers are connected to a houses electrical wiring to create a network A power-line network adapter connects nodes to electrical outlets

Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 22 Choosing a Peer-to-Peer Network Things to consider - Whether existing wiring is available Whether you want wireless communications How fast you want your network connection to be How much money you can spend on your network Comparing the Major Types of Home Networks

Wired Ethernet Power-Line Wireless 802.11g Wireless 802.11n Maximum data transfer rate (bandwidth)

100 Mbps to 1 Gbps 200 Mbps 54 Mbps 540 Mbps Relative installation and equipment costs for networking

two computers $ $$ $ $$ Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 23

Configuring Software for Your Home Network Windows Vista and later versions Use wizards launched from Network and Sharing Center in Control Panel Before running wizards: 1. Install network adapters on each node. 2. For a wired network, plug all the cables into the router, network adapters, and so on. Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall

24 Configuring Software for Your Home Network 3. Make sure your cable/DSL modem is connected to your router and the Internet. 4. Turn on your equipment in the following order: a. Cable/DSL modem b. Router c. All computers and peripherals (printers, scanners, and so on)

Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 25 Networking Multiple Versions of Windows Set up Windows 7 and Vista machines first Automatically detect other computers running Windows on network Windows XP will need adjustment to see other versions of Windows Give each Windows computer a unique

name Place all computers in the same workgroup Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 26 Configuring a Router to Connect to the Internet Contact ISP for special settings Access router from Web browser Enter username and password Use routers wizard to set up connection

using settings and info provided by ISP Test Internet connection speed Speedtest.net Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 27

Securing Wireless Networks Wireless network range doesnt stop at the property line Default device and network ID settings allow intruders to enter the network Internet bandwidth can be stolen Computers can be vulnerable to hacker intrusion and takeover Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 28 Securing Wireless Networks

To secure a wireless network, do the following: Change your network name (SSID) Disable SSID broadcast Change the default password on your router Turn on security protocols Implement media access control Limit your signal range Apply firmware upgrades Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 29

Chapter 7 Summary Questions What is a network, and what are the advantages of setting one up? Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 30 Chapter 7 Summary Questions What is the difference between a client/server network and a peer-to-peer network?

Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 31 Chapter 7 Summary Questions What are the main hardware components of every network? Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 32 Chapter 7 Summary Questions

What are the most common home networks? Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 33 Chapter 7 Summary Questions What are wired Ethernet networks, and how are they created? Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall

34 Chapter 7 Summary Questions What are wireless Ethernet networks, and how are they created? Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 35 Chapter 7 Summary Questions How are power-line networks created, and are they a viable alternative to Ethernet

networks? Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 36 Chapter 7 Summary Questions How do I configure my computers software to set up a network? Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 37

Chapter 7 Summary Questions Why are wireless networks more vulnerable than wired networks, and what special precautions are required to ensure my wireless network is secure? Copyright 2011 Pearson Education, Inc. Publishing as Prentice Hall 38 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 2011 Pearson Education, Inc. Publishing as Prentice Hall Chapter 7 39

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