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Exploring Computer Networks: Warriors of the Net

Discover ICMP, proxy servers, and webserver ports. Learn about wireless networking, IP addressing, and Web 2.0 interactivity. Explore Bluetooth technology and network security considerations.

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Exploring Computer Networks: Warriors of the Net

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  1. AQA A2COMP 3: Computer Networks

  2. Starter: Warriors of the net http://www.youtube.com/watch?v=Ve7_4ot-Dzs Watch warriors of the net at home Find out what ICMP is, the role of a proxy server and the port used for a webserver

  3. Exam questions: thinking ahead

  4. Answer • A. i) 192.168.0.x • X = 1 – 254 but not 0 or 255 • A. ii) 192.168.2.x • X = 1 - 254 but not 0 or 255 • 255.255.255.0 • Ip address, subnet mask and gateway

  5. Plan for this lesson By the end of the lesson you will be to: • Describe the principles and practices that tie together different uses of WWW • Describe wireless networking and the things to consider • Explain and be able to setup a computer using ip, gateway and subnet mask

  6. Web 2.0 • Link: We are creating and organising data • XML used to automate data and join different sets of data together • People are sharing, trading and collaborating • Web 2.0: range of uses for the web which are focused on interactivity. Cloud computing. • Facebook/Twitter, blogs, forums users are contributing data using different platforms

  7. Wireless network Setting up a traditional network involves using UTP cables that go through walls and ceiling WAP allows devices connecting wirelessly to connect to a network So we can have devices connected to the network without cables Note: 802.11 (wireless standard)

  8. Scenario (10) PRC, a local city college wants to setup wireless network in its traditional buildings They want students to be able to access the network using their own devices Research potential benefits and drawbacks of using wireless networks

  9. Ideas Security Performance Management Content filtering

  10. Bluetooth (8) Bluetooth is used to exchange data over a short distance, usually up to 10 metres Alternative to RS232 Bluetooth uses radio frequency and offers transfer speeds of up to 2 Mbps It creates a personal area network. Search for any articles that show any flaws in Bluetooth technology

  11. IP address / IP addressing Number Unique Broken down into two sections Network and host L= net R = host Public and private addressing IP addresses were originally broken down into classes i.e. classful addressing

  12. Activity Find out the difference between public and private address Find out your public address and private address (Routable and on routable)

  13. Demo Ping Tracert Ipconfig / all (go through ip, subnet mask and default gateway) Nslookup

  14. NCPA.CPL

  15. Plan for this lesson By the end of the lesson you will be to: • Describe the principles and practices that tie together different uses of WWW • Describe wireless networking and the things to consider • Explain and be able to setup a computer using ip, gateway and subnet mask

  16. Homework for next lesson • Read page 190: • web services • web services • architecture • and page 191 Ajax

  17. Exam questions: thinking ahead

  18. Next lesson Network hops

  19. Next lesson • Cover: • IP address range and classes • Do a bit of subnetting where possible • Get packet tracer • Online version packet tracer

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