1. AQA A2 COMP 3: Computer Networks

2. Starter: Warriors of the net http://www.youtube.com/watch?v=V e7_4ot-Dzs http://www.youtube.com/watch?v=V e7_4ot-Dzs http://www.youtube.com/watch?v=V e7_4ot-Dzs http://www.youtube.com/watch?v=V e7_4ot-Dzs Watch warriors of the net at home 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 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 Link: We are creating and organising data Link XML used to automate data and join different sets of data together XML used to automate data and join different sets of data together People are sharing, trading and collaborating People are sharing, trading and collaborating Web 2.0: range of uses for the web which are focused on interactivity. Cloud computing. 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 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 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 WAP allows devices connecting wirelessly to connect to a network So we can have devices connected to the network without cables So we can have devices connected to the network without cables Note: 802.11 (wireless standard) Note: 802.11 (wireless standard)

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

9. Ideas Security Security Performance Performance Management Management Content filtering Content filtering

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

11. IP address / IP addressing Number Number Unique Unique Broken down into two sections Broken down into two sections Network and host L= net R = host Network and host L= net R = host Public and private addressing Public and private addressing IP addresses were originally broken down into classes i.e. classful 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 the difference between public and private address Find out your public address and private address Find out your public address and private address (Routable and on routable) (Routable and on routable)

13. Demo Ping Ping Tracert Tracert Ipconfig / all (go through ip, subnet mask and default gateway) Ipconfig / all (go through ip, subnet mask and default gateway) Nslookup 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 architecture and page 191 Ajax

17. Exam questions: thinking ahead

18. Next lesson Network hops 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