Computers Networks and Networking The Data Communications Channel Wireless communication Microwave...
-
date post
20-Dec-2015 -
Category
Documents
-
view
217 -
download
0
Transcript of Computers Networks and Networking The Data Communications Channel Wireless communication Microwave...
![Page 1: Computers Networks and Networking The Data Communications Channel Wireless communication Microwave signal – sent from one transmitter to another Radio.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d445503460f94a21735/html5/thumbnails/1.jpg)
ComputersNetworks and Networking
The Data Communications ChannelWireless communication
Microwave signal – sent from one transmitter to anotherRadio frequency (RF) signal – line-of-sight
© 2005 Prentice-Hall, Inc. Slide 26
![Page 2: Computers Networks and Networking The Data Communications Channel Wireless communication Microwave signal – sent from one transmitter to another Radio.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d445503460f94a21735/html5/thumbnails/2.jpg)
ComputersNetworks and Networking
The Data Communications ChannelCommunications satellite – repeater for microwave transmissions in geosynchronous orbitGeosynchronous orbit – 22,300 miles above the earth
© 2005 Prentice-Hall, Inc. Slide 27
![Page 3: Computers Networks and Networking The Data Communications Channel Wireless communication Microwave signal – sent from one transmitter to another Radio.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d445503460f94a21735/html5/thumbnails/3.jpg)
ComputersNetworks and Networking
The Data Communications ChannelWireless networks
Access points – college campuses, coffee shops, local area networks
Wi-Fi – approximately 300 foot rangeBluetooth – approximately 30 foot range
© 2005 Prentice-Hall, Inc. Slide 28
![Page 4: Computers Networks and Networking The Data Communications Channel Wireless communication Microwave signal – sent from one transmitter to another Radio.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d445503460f94a21735/html5/thumbnails/4.jpg)
ComputersNetworks and Networking
The Data Communications ChannelWireless Application Protocol (WAP)
Internet access standard for wireless devices such as cell phones
© 2005 Prentice-Hall, Inc. Slide 29
![Page 5: Computers Networks and Networking The Data Communications Channel Wireless communication Microwave signal – sent from one transmitter to another Radio.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d445503460f94a21735/html5/thumbnails/5.jpg)
ComputersNetworks and Networking
The Data Communications ChannelFuture of wireless
Multichannel Multipoint Distribution Service (MMDS)Local Multipoint Distribution Service (LMDS)
© 2005 Prentice-Hall, Inc. Slide 30
![Page 6: Computers Networks and Networking The Data Communications Channel Wireless communication Microwave signal – sent from one transmitter to another Radio.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d445503460f94a21735/html5/thumbnails/6.jpg)
ComputersNetworks and Networking
The Data Communications ChannelCommon carriers
Examples: AT&T, Sprint, MCIPrivate line (leased line) – charge based on channel capacity and distanceSwitched line (dialup line) – time and distance charge
© 2005 Prentice-Hall, Inc. Slide 31
![Page 7: Computers Networks and Networking The Data Communications Channel Wireless communication Microwave signal – sent from one transmitter to another Radio.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d445503460f94a21735/html5/thumbnails/7.jpg)
ComputersNetworks and Networking
The Data Communications ChannelCommunications protocols – rules established to govern the way data are transmitted in a computer network Asynchronous transmission – data sent on an as-needed basisSynchronous transmission – source and destination operate in timed synchronization
© 2005 Prentice-Hall, Inc. Slide 32
![Page 8: Computers Networks and Networking The Data Communications Channel Wireless communication Microwave signal – sent from one transmitter to another Radio.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d445503460f94a21735/html5/thumbnails/8.jpg)
ComputersNetworks and Networking
NetworksNode – terminal, PC, or any device connected to a network
© 2005 Prentice-Hall, Inc. Slide 33
![Page 9: Computers Networks and Networking The Data Communications Channel Wireless communication Microwave signal – sent from one transmitter to another Radio.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d445503460f94a21735/html5/thumbnails/9.jpg)
ComputersNetworks and Networking
NetworksTypes of Networks
Personal Area Network (PAN) – connects cell phones or other electronics to the networkLocal Area Network (LAN) – nodes are in close proximity
© 2005 Prentice-Hall, Inc. Slide 34
![Page 10: Computers Networks and Networking The Data Communications Channel Wireless communication Microwave signal – sent from one transmitter to another Radio.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d445503460f94a21735/html5/thumbnails/10.jpg)
ComputersNetworks and Networking
NetworksTypes of Networks
Metropolitan Area Network (MAN) – network that encompasses a cityWide Area Network (WAN) – nodes of the network are geographically distant
© 2005 Prentice-Hall, Inc. Slide 35
![Page 11: Computers Networks and Networking The Data Communications Channel Wireless communication Microwave signal – sent from one transmitter to another Radio.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d445503460f94a21735/html5/thumbnails/11.jpg)
ComputersNetworks and Networking
NetworksLAN resources that can be shared
Applications software Links to other LANs Communications capabilities I/O devices Storage devices Add-on boards
© 2005 Prentice-Hall, Inc. Slide 36
![Page 12: Computers Networks and Networking The Data Communications Channel Wireless communication Microwave signal – sent from one transmitter to another Radio.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d445503460f94a21735/html5/thumbnails/12.jpg)
ComputersNetworks and Networking
NetworksLAN access methods
Network Access Method – rule that a network uses to determine priorities
Logical topology
© 2005 Prentice-Hall, Inc. Slide 37
![Page 13: Computers Networks and Networking The Data Communications Channel Wireless communication Microwave signal – sent from one transmitter to another Radio.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d445503460f94a21735/html5/thumbnails/13.jpg)
ComputersNetworks and Networking
NetworksEthernet – widely used network access method; uses Carrier Sense Multiple Access/Collision Detection (CSMA/CD protocol)Token Access Method
© 2005 Prentice-Hall, Inc. Slide 38
![Page 14: Computers Networks and Networking The Data Communications Channel Wireless communication Microwave signal – sent from one transmitter to another Radio.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d445503460f94a21735/html5/thumbnails/14.jpg)
ComputersNetworks and Networking
NetworksServers
File server – stores programs and data to be shared via the networkPrint server – handles print jobsCommunication server – provides access to other networksLAN server – PC designed to be server
© 2005 Prentice-Hall, Inc. Slide 39
![Page 15: Computers Networks and Networking The Data Communications Channel Wireless communication Microwave signal – sent from one transmitter to another Radio.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d445503460f94a21735/html5/thumbnails/15.jpg)
ComputersNetworks and Networking
NetworksLAN software
Network operating system (NOS)Peer-to-peer (P2P)Dedicated server
© 2005 Prentice-Hall, Inc. Slide 40
![Page 16: Computers Networks and Networking The Data Communications Channel Wireless communication Microwave signal – sent from one transmitter to another Radio.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d445503460f94a21735/html5/thumbnails/16.jpg)
ComputersNetworks and Networking
NetworksLAN software
Peer-to-peer LAN – all PCs are equal in the networkClient/server LAN – NOS resides on the server computer
© 2005 Prentice-Hall, Inc. Slide 41
![Page 17: Computers Networks and Networking The Data Communications Channel Wireless communication Microwave signal – sent from one transmitter to another Radio.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d445503460f94a21735/html5/thumbnails/17.jpg)
ComputersNetworks and Networking
NetworksApplication software for LANs
Client/server LAN applications softwareFront-end application software – user interface and applications software processed locally Back-end application software – handles tasks associated with storage and maintenance of databases
© 2005 Prentice-Hall, Inc. Slide 42
![Page 18: Computers Networks and Networking The Data Communications Channel Wireless communication Microwave signal – sent from one transmitter to another Radio.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d445503460f94a21735/html5/thumbnails/18.jpg)
ComputersNetworks and Networking
NetworksApplication software for LANs
Download (server-to-client)Upload (client-to-server)
© 2005 Prentice-Hall, Inc. Slide 43
![Page 19: Computers Networks and Networking The Data Communications Channel Wireless communication Microwave signal – sent from one transmitter to another Radio.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d445503460f94a21735/html5/thumbnails/19.jpg)
ComputersNetworks and Networking
NetworksShared applications software
Groupware – allows a group of people to work on a project
© 2005 Prentice-Hall, Inc. Slide 44
![Page 20: Computers Networks and Networking The Data Communications Channel Wireless communication Microwave signal – sent from one transmitter to another Radio.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d445503460f94a21735/html5/thumbnails/20.jpg)
ComputersNetworks and Networking
NetworksShared applications software
Electronic mail (e-mail)Instant messagingCalendar and schedulingBrainstormingShared whiteboarding
© 2005 Prentice-Hall, Inc. Slide 45
![Page 21: Computers Networks and Networking The Data Communications Channel Wireless communication Microwave signal – sent from one transmitter to another Radio.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d445503460f94a21735/html5/thumbnails/21.jpg)
ComputersNetworks and Networking
NetworksShared applications software
Setting prioritiesElectronic conferencingElectronic forms
© 2005 Prentice-Hall, Inc. Slide 46
![Page 22: Computers Networks and Networking The Data Communications Channel Wireless communication Microwave signal – sent from one transmitter to another Radio.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d445503460f94a21735/html5/thumbnails/22.jpg)
ComputersNetworks and Networking
NetworksHome network – small LAN in the home
© 2005 Prentice-Hall, Inc. Slide 47
![Page 23: Computers Networks and Networking The Data Communications Channel Wireless communication Microwave signal – sent from one transmitter to another Radio.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d445503460f94a21735/html5/thumbnails/23.jpg)
ComputersNetworks and Networking
NetworksHome network technologies
WiredWirelessHome phoneline networking (HomePNA or HPNA) – uses existing telephone lines to create the networkHomePlug – uses electrical lines to connect computers in the network
© 2005 Prentice-Hall, Inc. Slide 48
![Page 24: Computers Networks and Networking The Data Communications Channel Wireless communication Microwave signal – sent from one transmitter to another Radio.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d445503460f94a21735/html5/thumbnails/24.jpg)
ComputersNetworks and Networking
NetworksHome network decisions
How many computers? Where will they be placed?How much do you want to spend?What is your networking expertise?Do you expect the network to grow?What applications do you want to run?
© 2005 Prentice-Hall, Inc. Slide 49
![Page 25: Computers Networks and Networking The Data Communications Channel Wireless communication Microwave signal – sent from one transmitter to another Radio.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d445503460f94a21735/html5/thumbnails/25.jpg)
ComputersNetworks and Networking
NetworksSteps to installing a home network
Install network interface cardsSet up communication hardwareLink PCs to router/hub/switchSet up network softwareIdentify files/printers to be sharedSet up Internet connection sharing
© 2005 Prentice-Hall, Inc. Slide 50
![Page 26: Computers Networks and Networking The Data Communications Channel Wireless communication Microwave signal – sent from one transmitter to another Radio.](https://reader030.fdocuments.us/reader030/viewer/2022032800/56649d445503460f94a21735/html5/thumbnails/26.jpg)
Computers Chapter 6 – Networks and Networking
Lesson Summary• Apply the concept of connectivity to
your life• Understand data communications
hardware• Identify data transmission services• Understand the various network
topologies• Recognize the potential of home
networking
© 2005 Prentice-Hall, Inc. Slide 51