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Unit 12

Learn important safety measures to protect your computer and personal information while using the internet. Avoid viruses, secure passwords, and handle hardware properly.

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Unit 12

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  1. Unit 12 The Internet

  2. 1 Starter

  3. Starter 1 • D • G • B • C • F • A • e

  4. 2 Reading

  5. Reading 2

  6. Reading 2

  7. Reading 2

  8. 4 Language Work

  9. Avoid giving open access to PCs because you may get viruses. • Never use your own programs on these machines. You may introduce viruses. • You must not drink coffee in this lab. If you spill it you may damage the keyboard. • Don’t give financial information in a chat rom. Some one may try to cheat you. • Always keep your password a secret. Someone may hack in to your system. • Use up to date antivirus software. New viruses appear all the time.

  10. 7. Always wait until a computer has reached normal room temperature before using it or you may damage the hard disk. 8. Never remove cards from there anti-static packing until required. Otherwise you may damage them. • Use an IC extraction tool rather than a screwdriver. The pins are fragile. 10. You must not work on a computer with the power on because you may be electrocuted.

  11. SpecialistReading

  12. Specialist Reading – Part A • It provides a path that gateways can use to route information from one machine to another. • Ethernet and X.25 • The must know each other’s internet address • One for each different network it connects • Creates a data address in the TCP/IP message that states exactly what application the data block is supposed to connect at the address the IP software has described.

  13. Specialist Reading – Part A • Once the packet is delivered to the correct internet address and application port. • Looks for responses and takes action to replace missing data blocks. • File Transfer Protocol and the Simple Mail Transfer Protocol.

  14. Specialist Reading – Part B • a-iv , b-i , c-v , d-vi , e-ii , f-iii • a-True , b-True , c-True , d-False , e-False , f-False

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