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Computer networks

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J
John Cook

This slideshare is designed to give teachers an overview of the function of computer networks. Some information is specific to Regis Catholic Schools in Eau Claire, WI.

Education
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Computer Networks A Guide for Teachers
What is a computer network? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
What is the use of a computer network? ,[object Object],[object Object],[object Object],[object Object],[object Object]
Types of computer networks ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Peer-to-Peer network ,[object Object],[object Object],[object Object],[object Object],[object Object]
Client/Server network ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
What is a server? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
What happens when you log into the school network? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Your desktop is loaded and you can access the drives on the server from your computer.
How does data travel on the network? ,[object Object],Ethernet cable has four pairs of wires that transfer data on the network. The data travels from your computer to the server over Ethernet cable.
Connections on the Network ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Chunks of Data ,[object Object],[object Object],[object Object],[object Object]
The Packet The header contains the address of the packet's destination. The payload contains the data in the packet.  This could be part of a username, password, or a picture from a web site. The trailer contains error checking to make sure the entire packet is delivered.
Network Packets ,[object Object],[object Object],[object Object]
Smaller to Larger Networks ,[object Object],[object Object],[object Object]
Many WAN's joined together to make the Internet.
How data gets to the Internet ,[object Object],[object Object],[object Object],[object Object],If you want to go to Google's search page, you would type the URL into your browser and hit 'Enter'. Your computer chops up this request into packets and sends them through the Ethernet cord onto the LAN.      
How data gets to the Internet ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],The school ISP directs your request for the Google search page to Google's servers.      
How data gets to the Internet ,[object Object],Google's servers send packets that contain the code needed to show their search page on your computer.
How data gets to the Internet ,[object Object],The same process is repeated if you were to use this page to perform a search.
Why is the network slow? ,[object Object],[object Object]
Network Slowdown ,[object Object],[object Object],[object Object],[object Object]
Resources ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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Computer networks

  • 1. Computer Networks A Guide for Teachers
  • 2.
  • 3.
  • 4.
  • 5.
  • 6.
  • 7.
  • 8.
  • 9.
  • 10.
  • 11.
  • 12. The Packet The header contains the address of the packet's destination. The payload contains the data in the packet.  This could be part of a username, password, or a picture from a web site. The trailer contains error checking to make sure the entire packet is delivered.
  • 13.
  • 14.
  • 15. Many WAN's joined together to make the Internet.
  • 16.
  • 17.
  • 18.
  • 19.
  • 20.
  • 21.
  • 22.