1. O-Net () 2551 O-Net 2551 ( 22 .. 52)17. 1. 2. 3. 4. 18. 1. 2. 3. 4. 19. (Optical Technology)1. (Tape player)2. (CD-ROM drive)3. (Flash memory)4. (Touch screen)

2. 20. 1. 2. 3. (RAM)4. (ROM)21. 1. 2. 3. 4. 22. 1. 2. 3. 4. 3. 23. 1. 2. 3. 4. 24. 1. Open Office Writer2. Microsoft Office Word3. Portable Document Format4. Graphics Interchange Format25. 1. Solaris , Symbian , IPX , RAM2. DOS , WWW , Linux , Windows3. Symbian , Mac OS , Linux , Windows4. Unix , Linux , Mac OS , Microsoft Office 4. 26. 1. (database) 2. (presentation) 3. (spread sheet) 4. (word processing)27. 1. 2. 3. 1 . 4. 28. 1. (UPS) 2. 3. 4. 5. 29. 1. 2. 3. 4. 30. 1. (mouse)2. (hard disk)3. (touch screen)4. (CD-writer)31. 3 1. (hub) 2. (bridge)3. (switch)4. (router) 6. 32. 1. (worm)2. (virus) 3. (spyware) 4. (trojan horse)33. (OpenSystem Interconnection : OSI) 1. (transport) 2. (network layer) 3. (physical layer) 4. (data link layer)34. " P , M , N P M N" M N 7. 35. " 8 2551 1 2,500 2,000 10 2552 400 " 1. 2,500 2. 400 3. 10 2552 2,000 4. 400 2,000 36. 1. 2. 3. 4. 37. 144 1. 2. 3. 4. 38. 1. 2. 3. 4. 8. 39. " " - 2551" 1. 25512. " 2551"3. + - 25514. + + 255140. 1. 2. 3. 4. 30 ------------------------------------------------------------------------------------------