Networks. A network is formed when a group of computers are connected together. Computers in a Local...
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Transcript of Networks. A network is formed when a group of computers are connected together. Computers in a Local...
![Page 1: Networks. A network is formed when a group of computers are connected together. Computers in a Local Area Network (LAN) are fairly close together, generally.](https://reader036.fdocuments.in/reader036/viewer/2022062314/56649f175503460f94c2dae0/html5/thumbnails/1.jpg)
Computer communication
Networks
![Page 2: Networks. A network is formed when a group of computers are connected together. Computers in a Local Area Network (LAN) are fairly close together, generally.](https://reader036.fdocuments.in/reader036/viewer/2022062314/56649f175503460f94c2dae0/html5/thumbnails/2.jpg)
What is a network
• A network is formed when a group of computers are connected together.
• Computers in a Local Area Network (LAN) are fairly close together, generally within one building or a site.
• Computers can be connected together using cabling or using radio transmitters to provide a wireless LAN.
![Page 3: Networks. A network is formed when a group of computers are connected together. Computers in a Local Area Network (LAN) are fairly close together, generally.](https://reader036.fdocuments.in/reader036/viewer/2022062314/56649f175503460f94c2dae0/html5/thumbnails/3.jpg)
Advantages of networks
• Share and exchange information easily.• Workgroups
– Groups sending data to each other– Work collaboratively– Documents edited by multiple users
![Page 4: Networks. A network is formed when a group of computers are connected together. Computers in a Local Area Network (LAN) are fairly close together, generally.](https://reader036.fdocuments.in/reader036/viewer/2022062314/56649f175503460f94c2dae0/html5/thumbnails/4.jpg)
Advantages of networks
• Shared Databases– Centralised Databases made possible with
networks– Central server has data – Remote Access through terminals or other
computers
![Page 5: Networks. A network is formed when a group of computers are connected together. Computers in a Local Area Network (LAN) are fairly close together, generally.](https://reader036.fdocuments.in/reader036/viewer/2022062314/56649f175503460f94c2dae0/html5/thumbnails/5.jpg)
Advantages of networks
• Distributed systems– A system is split up into different parts– Low end computers running each part– Problems divided– No single point of failure
- Resources efficiently located (e.g. localised payroll)
![Page 6: Networks. A network is formed when a group of computers are connected together. Computers in a Local Area Network (LAN) are fairly close together, generally.](https://reader036.fdocuments.in/reader036/viewer/2022062314/56649f175503460f94c2dae0/html5/thumbnails/6.jpg)
Advantages of networks
• Communications– Sharing data– Emails– VOIP software– Video Conferencing– Social networking
![Page 7: Networks. A network is formed when a group of computers are connected together. Computers in a Local Area Network (LAN) are fairly close together, generally.](https://reader036.fdocuments.in/reader036/viewer/2022062314/56649f175503460f94c2dae0/html5/thumbnails/7.jpg)
Advantages of networks
• Device Sharing– Printers– Servers – Media, Email, File– Routers – Access to internet– Optical Drives– Backup systems
![Page 8: Networks. A network is formed when a group of computers are connected together. Computers in a Local Area Network (LAN) are fairly close together, generally.](https://reader036.fdocuments.in/reader036/viewer/2022062314/56649f175503460f94c2dae0/html5/thumbnails/8.jpg)
Advantages of networks
• Security– Auditing – Limiting user access– User profiles
![Page 9: Networks. A network is formed when a group of computers are connected together. Computers in a Local Area Network (LAN) are fairly close together, generally.](https://reader036.fdocuments.in/reader036/viewer/2022062314/56649f175503460f94c2dae0/html5/thumbnails/9.jpg)
Disadvantages of Networks
• Expertise– Highly technical field setting up a network– Expensive to hire and train right staff– Alternative Options
• SAAS• PAAS• IAAS
![Page 10: Networks. A network is formed when a group of computers are connected together. Computers in a Local Area Network (LAN) are fairly close together, generally.](https://reader036.fdocuments.in/reader036/viewer/2022062314/56649f175503460f94c2dae0/html5/thumbnails/10.jpg)
Disadvantages of Networks
• Security– Unauthorised access– Viruses can spread quickly round a network– Password maintenance
![Page 11: Networks. A network is formed when a group of computers are connected together. Computers in a Local Area Network (LAN) are fairly close together, generally.](https://reader036.fdocuments.in/reader036/viewer/2022062314/56649f175503460f94c2dae0/html5/thumbnails/11.jpg)
Disadvantages of Networks
• Wiring– Expensive to buy and install.– Ergonomics of the infrastructure difficult to set
up– Updating hardware