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CompTIA A+Complete Study Guide (220-901 Exam)In order to receive CompTIA A+ certification a candidate must pass two exams. The first exam is CompTIA A+ 220-901 Certification Exam. The CompTIA A+ 220-901 examination measures necessary competencies for an entry-level IT professional with the equivalent knowledge of at least 12 months of hands-on experience in the lab or field.Successful candidates will have the knowledge required to: -Assemble components based on customer requirements-Install, configure and maintain devices, PCs and software for end users-Understand the basics of networking and security/forensics-Properly and safely diagnose, resolve and document common hardware and software issues-Apply troubleshooting skills-Provide appropriate customer support-Understand the basics of virtualization, desktop imaging, and deploymentCompTIA A+ is accredited by ANSI to show compliance with the ISO 17024 Standard and, as such, undergoes regular reviews and updates to the exam objectives. The following CompTIA A+ 220-901 exam objectives result from subject matter expert workshops and industry-wide survey results regarding the skills and knowledge required of an entry-level IT professional. The percentages in this document represent the relative importance of the subject areas (domains) in the associated body of knowledge, and together establish the foundation of an entry-level IT professional. This examination blueprint includes domain weighting, test objectives, and example content. Example topics and concepts are included to clarify the test objectives and should not be construed as acomprehensive listing of all the content of this examination.IntroductionWhat is CompTIA Certification?What are CompTIA Certifications?Other Types of CompTIA CertificationsWhy Obtain Certification?What is an A + Certificate?What are the subjects covered in the certificate?Exam 220-901Exam 220-902Mechanism for taking the examObtaining the certificate and its validityChapter IRebootForm factorMotherboard componentsCPU SocketBusesNorthbridge and SouthbridgeMemory slotsExpansion SlotsFeed portsPATA / IDE portConnecting ports to the box bodyConclusionBIOSTakeoff processBIOS settingsReprogrammingThe UEFI system is a replacement for BIOSITE chip and Winbond chipIntegrated chipsBack portsElectronic itemsCapacitorsJumperHow to choose the right motherboardConclusionChapter IIProcessor componentsControl UnitALU (Arithmetic Logic Unit)MMC (Memory Management Unit)Form factorLGAPGASECCCache memoryTypes of cache memoryMechanism of working with the processorMulticore processorsClock speedBuy and install a processor on the motherboardConclusionChapter IIIRebootHard drive componentsDiscs PlattersRead / write headsElectric motorsElectronic boardHard drive specificationsFormatting the hard driveRetail PartitioningHigh-level configurationDisk storage mechanismForm factorHard drive delivery techniquesPATA (Parallel ATA)SATA technology (Serial ATA)SAS (Serial Attached SCSI)SSD alternativeChapter IVPowerTypes of connectionsForm factorHow to choose the right feed unitChapter VTypes of printersCollision printersNon-collision printersLaser PrintersOther types of printersThermal printerPhoto PrinterPortable PrintersThe multifunction printerChapter VITCP / IP ModelProtocolsMedia Access ControlICMPTCPUDPHTTPFTPDNSSSHConclusionChapter VIINetwork cardDistributorSwitcherthe bridgeThe routerWireless access pointPlug cablesCoaxial cableStranded cableOptical fiber cablePhysical network diagramsBus chartStar chartRing chartFull-MeshConclusionMotherboard problems and crashesCrash test cardRAM problems and crashesProcessor problems and crashesHard drive problems and crashesConclusion.