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The internet. Computer Server This is a computer A network is a combination of computers and servers. They are all connected to allowing them to share.

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Presentation on theme: "The internet. Computer Server This is a computer A network is a combination of computers and servers. They are all connected to allowing them to share."— Presentation transcript:

1 The internet

2 Computer Server This is a computer A network is a combination of computers and servers. They are all connected to allowing them to share information. Most of the time, computers are connected to one another through a server. But sometimes computers are directly connected to each other.

3 Your home Computer LaptopPrinter Computer Phone T.V Box Router Information

4 Your ISP Internet Service Provider Home network (LAN) Home network (LAN) Home network (LAN) Home network (LAN) Home network (LAN) Home network (LAN) Website Request Website html data

5 The Internet. ISP

6 IP Address Computer All computers have names. Computers names arent as unique as Alex, Jason, Susan, Jamie, etc. Computers like numbers Bad! Very good!

7 Websites? Internet Service Provider Microsoft.com

8 Information Sending – Packets – UDP – Sending Packets Computer Computer Computer Hello How are you doing? Hi! Im doing fine! Basic Packet Protocol Who are you sending the information to? What is the information you want to send?

9 Information Sending – Packets – UDP – Out of Order! Computer Computer Computer Hello Basic Packet Protocol Who are you sending the information to? What is the information you want to send? How Are you Doing? Oh no! The packets didnt all arrive at the same time, so theyre all out of order!

10 Information Sending – Packets – UDP – Reorder those packets. Computer Computer Computer Hello Basic Packet Protocol Who are you sending the information to? What is the information you want to send? How Are you Doing?

11 Information Sending – Packets – UDP – Broken Connections Computer Computer Computer Hello Basic Packet Protocol Who are you sending the information to? What is the information you want to send? How Are you Doing?

12 Information Sending – Streams – TCP – Sending Packets Stream protocol Form connection with end computer Send information. Form Stream connection Hello how are you doing?

13 Information Sending – Streams – TCP – Stream of Information Stream protocol Form connection with end computer Send information

14 Information Sending – Streams – TCP – There is no end Stream protocol Form connection with end computer Send information. Do the Laundry Take out the Trash Sweep the Floor Mow the Lawn

15 Student Activity: Creating Protocols

16 Imagine two computers are connected by either a literal connection or through a stream The first computer sends some information to the second computer. You dont exactly know how the packets are structured however Hello Friend

17 Packets have a chance of getting very complex! They can contain things like : Where theyre going Who sent it. What kind of information. Commands. Send to: Piece: 0 Message: Hello Friend! Command: Delete after reading. End: Imagine two computers are connected by either a literal connection or through a stream.

18 If sends a packet of random information to 00 02, can you decode it and find out what information is being sent? What order is the information in? (00 02) (00) (He ll o_) ( ) (00 02) (01) (fr _i e_) ( ) (00 02) (02) (nd !_ __) ( ) (00 02) (03) ( ) Imagine two computers are connected by either a literal connection or through a stream.


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