Information And Communication Technology Syllabuses Based On And Complete Compilation For A Level

ICT COMPUTER NOTES F OR A’LEVELS BEN EWOKU Public INFORMATION TECHNOLOGY NOTES BASED ON THE SYLLABUS A COMPLETE COMPILATION FOR A’LEVEL ii Public Table of Contents INTRODUCTION TO COMPUTING CONTENT ................................ ............................ i INTRODUCTION TO COMPUTERS ................................ ................................ ........... 1 Characteristics of modern computers ................................ ................................ ... 2 Modes of acquiring computers ................................ ................................ ............ 3 PARTS OF THE COMPUTER ................................ ................................ .................... 3 FUNCTIONS OF EACH PART OF THE COMPUTER ................................ ..................... 4 CONNECTING VARIOUS COMPUTER PARTS TOGETHER ................................ ........... 5 THE COMPUTER SYSTEM ................................ ................................ ...................... 5 QUALITIES OF GOOD INFORMATION ................................ ................................ ..... 9 THE INFORMATION PROCESSING CYCLE ................................ ................................ 9 WORLD OF ICTs ................................ ................................ ................................ . 10 APPLICATION OF ICTS ................................ ................................ ........................ 12 APPLICATION OF IT IN LEISURE & ENTERTAINMENT ................................ ............ 15 APPLICATION OF ICT IN INDUSTRIES ................................ ................................ .. 16 IMPLICATION OF USING ICT ................................ ................................ ............... 17 GREEN COMPUTING ................................ ................................ ........................... 18 WAYS THROUGH WHICH GREEN COMPUTING CAN BE PRACTICED ......................... 18 CONCEPT OF CLOUD COMPUTING ................................ ................................ ....... 19 ADVANTAGES OF CLOUD COMPUTING ................................ ................................ . 20 Cost Efficiency ................................ ................................ ................................ 20 Convenience and continuous availability ................................ ............................ 20 Backup and Recovery ................................ ................................ ...................... 20 Cloud is environmentally friendly ................................ ................................ ....... 20 Scalability and Performance ................................ ................................ .............. 20 Quick deployment and ease of integration ................................ ......................... 20 Increased Storage Capacity ................................ ................................ .............. 21 Smaller learning curve ................................ ................................ ..................... 21 iii Public DISADVANTAGES OF CLOUD COMPUTING ................................ ............................ 21 Security and privacy in the Cloud ................................ ................................ ...... 21 Dependency and vendor lock -in (Data migration problem when changing the cloud provider) ................................ ................................ ................................ ........ 21 Limited control and flexibility ................................ ................................ ............ 22 Increased Vulnerability ................................ ................................ .................... 22 TERM INOLOGIES ................................ ................................ ................................ 23 BOOTING PROCESS ................................ ................................ ............................ 23 CONDITIONS …