xv CHAPTER 18 Data Recovery ..............................................................616 CHAPTER 19 Introduction to Networking ...........................................636 CHAPTER 20 Network Communication, Media, and Tools ..................664 CHAPTER 21 Network Administration ................................................692 CHAPTER 22 Wide Area Network (WAN) .............................................738 CHAPTER 23 Small-Office/Home-Office (SOHO) Networking .............788 CHAPTER 24 Customer Support, Communication, and Professionalism.....................................................824 CHAPTER 25 CompTIA A+ Certification Exams Preparation ..............854 CHAPTER 26 Employment and Advanced Education .........................892 APPENDIX A CompTIA A+ Exam Correlation Charts ..........................910 APPENDIX B Scripting Basics ...........................................................957 APPENDIX C Linux and Mac Operating Systems Handbook ...............960 APPENDIX D List of Acronyms ...........................................................963 APPENDIX E Binary Math..................................................................970 APPENDIX F Number Conversion Table .............................................972 APPENDIX G Table of Standard ASCII Characters .............................974 GLOSSARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 976 INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 992 CHAPTER 1 Introduction to a Typical PC..............................................2 CHAPTER 2 Operating Systems .........................................................38 CHAPTER 3 Motherboards .................................................................78 CHAPTER 4 Central Processing Unit (CPU) .....................................120 CHAPTER 5 Power Supplies .............................................................156 CHAPTER 6 Memory.........................................................................190 CHAPTER 7 Input Devices ...............................................................230 CHAPTER 8 Video Systems ..............................................................264 CHAPTER 9 Audio Systems ..............................................................302 CHAPTER 10 Magnetic and Solid-State Storage Devices ..................318 CHAPTER 11 Optical Storage Technology ..........................................372 CHAPTER 12 Printers ........................................................................400 CHAPTER 13 Laptops and Mobile Devices .........................................438 CHAPTER 14 Modems and Transceivers ............................................492 CHAPTER 15 Physical Security and Authentication ...........................524 CHAPTER 16 Security Applications and Malware ..............................544 CHAPTER 17 PC Troubleshooting.......................................................574 Brief Contents