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Networks and the Internet

Networks and the Internet. Unit 11.3 C. Lesson Objectives. Know the purpose of a network Know the pros and cons of a network Know the different types of network topologies . Starter activity. http:// www.bbc.co.uk/schools/gcsebitesize/ict/datacomm/2networks_act.shtml MAIN ACTIVITY

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Networks and the Internet

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  1. Networks and the Internet Unit 11.3 C

  2. Lesson Objectives • Know the purpose of a network • Know the pros and cons of a network • Know the different types of network topologies

  3. Starter activity • http://www.bbc.co.uk/schools/gcsebitesize/ict/datacomm/2networks_act.shtml • MAIN ACTIVITY • http://www.bbc.co.uk/schools/gcsebitesize/ict/datacomm/2networksrev1.shtml • PLENARY ACTIVITY • http://www.bbc.co.uk/apps/ifl/schools/gcsebitesize/ict/quizengine?quiz=networks;templateStyle=ict

  4. Research notes • Using BBC BITESIZE, take notes of the following • Give definitions of: • BUS • STAR • RING • Extension Task – • Give the reasons why networks are used and explain the risks involved for large organizations • PROS & CONS of each topology • Draw a diagram of each type

  5. Wikibooks • Why was ARPANET created? • What is packet switching? • What analogy can be used to explain packet switching? • What is TCP/IP? • Why do some countries try to restrict the use of the internet? • When has this happened recently? • Give a definition of the World Wide Web. • How is an intranet different from the internet? • Describe a hyperlink and what it is used for. • Who is Tim Berners-Lee and what did he invent? • How is the internet different from the World Wide Web? • Explain what a router is and it’s function. Structure_of_the_Internet_and_World_Wide_Web

  6. Plato’s dialogue • Using the research you have just carried out, write a script or a dialogue that explains the theory you have just covered • Make this into a conversation that explains the theory as easily as possible - Make it accurate and correct • DO NOT just repeat 12 questions and 12 answers • Make it interesting and funny

  7. Network hardware task • For each network hardware device, create a slideshow with one slide with: • Title • A description in your own words • An image • http://www.teach-ict.com/gcse_computing/ocr/215_communications_networking/network_hardware/home_network_hardware.htm

  8. Next… • Security • FTP- Protocols • Cloud computing & web services • IP telephony

  9. Security – hacking & encryption • Know what hacking is • Know how to crack simple passwords • Know how to make your own passwords stronger from attack

  10. Security – hacking & encryption • Starter - in pairs: • Discuss what you think hacking is and why people might like to do it? • Think of times when you have heard about in the news. Discuss these with the class. • How can hacking be prevented?

  11. Security – hacking & encryption • How to hack a password tutorial • http://www.youtube.com/watch?v=97CdJFyAv1s

  12. Becoming a hacker • Using the tips learned from watching the video, I want to crack my password • You can use words from English dictionary or any combination of letters or numbers, UPPER CASE and lower case, symbols and characters. • I will give you some key words to give you a start

  13. clues • These are the key words you can try using a Brute Force attack: • cOMPUTERsCIENCE • ASTAna • school • KAZAKHSTAN • nAZARBAYEV • Any number from 1 - 9 You have 2 minutes!

  14. Making Passwords stronger • Make a poster listing 3 rules to create a secure password. • Explain system software such as firewalls and anti-virus programmes might help you be secure. • Use Publisher or any package of your choice.

  15. Extension activity – wireless security task • Name the pros and cons of using a wireless network • Describe the hardware and software you would need to crack wireless network password • Name three examples of code that you would need to enter when attempting to crack a wireless network • How long would it take you crack a wireless network password? 1 day, 1 week, 1 year? • Can hacking ever be a good thing? How? Why? Examples? • http://www.youtube.com/watch?v=jETwvEDaJeQ&feature=endscreen&NR=1

  16. Network hardware task • For each network hardware device, create a slideshow with one slide with: • Title • A description in your own words • An image • http://www.teach-ict.com/gcse_computing/ocr/215_communications_networking/network_hardware/home_network_hardware.htm

  17. MESH/HYBRIDNETWORKS TOPOLOGIES CONTINUED…

  18. MESH/HYBRID NETWORKS • A mesh or hybrid network is many network topologies combined to form one network • It can span large distances • It uses different types of topologies • Allows faster transfer of data • Uses more cabling than Star or Ring • More Expensive • More cabling and hardware is required • More technicians may be required to install and maintain it

  19. MESH/HYBRID NETWORKS • You are to be assigned into 3 groups to create 3 types of topology: • STAR • RING • BUS • Then you are will be given some extra pieces of hardware to make a mesh network comprising all three topologies • Hardware Devices: • Server HubBridgeRouter

  20. research the meaning of HTTP error codes 200, 403, 404, 500, 503 Protocol Extension activities

  21. Cloud computing THE CLOUD • Using the information from the video clip, note 3 benefits and 3 drawbacks for a cloud computing business and home user • http://www.commoncraft.com/video/cloud-computing

  22. Cloud computing • Using the link below, answer these questions: • Give an example of where a server might be used: • What is a server and what is a client? • Describe the process involved in a web server delivering a web page to a client: • Describe a situation where having a single server and many client model might not work too well: • Name some example of web services in the cloud • Cloud Computing

  23. Protocols… • FTP • HTTP • SMPT • POP • HTTPS • TCP/IP

  24. Protocols notes and exercises • What is a protocol? • What is a port number? • Describe the different protocols and explain their functions • http://en.wikibooks.org/wiki/A-level_Computing/AQA/Computer_Components,_The_Stored_Program_Concept_and_the_Internet/Structure_of_the_Internet/Protocols

  25. Home Work for 1/11/2012 • What is a protocol? • What is a port number? • Describe the different protocols and explain their functions • Give your written answers on a neat piece of paper for • tomorrow’slesson. • Write each question above each answer. • Include your name, date and title on each sheet of paper?

  26. research the meaning of HTTP error codes 200, 403, 404, 500, 503 Protocol Extension activities

  27. MAC ADDRESSING • Imagine that you a device (smart phone, tablet, PC) connected to the internet • You move location and your connection to the internet changes but you are still connected to the web • Your IP address had changed totally but you are still connected to the web • How is the this possible?

  28. MAC ADDRESSING & the IP stack • Using the link below, read through the notes on MAC Addressing and IP Addresses and answer the questions at the bottom of the page • http://en.wikibooks.org/wiki/A-level_Computing/AQA/Computer_Components,_The_Stored_Program_Concept_and_the_Internet/Structure_of_the_Internet/TCP/IP_protocol_stack

  29. IP TELEPHONY GIVE EXAMPLES OF SOFTWARE USED EVERYDAY • Investigate what VOIP (Voice over the Internet Protocol) is and what it is used for • Make a one page poster using your research • Make snappy (NO huge chunks of writing) • Make it visual • Make it colourful • Make it accurate and easy to understand

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