Mobile Devices Study Guide

1.0 Mobile Devices 1.1 Given a scenario, install and configure laptop hardware and components. • Hardware/device replacement - Battery - Keyboard/keys - Random-access memory (RAM) 1.2 • Physical privacy and security components - Biometrics - Near-field scanner features Compare and contrast the display components of mobile devices. • Types - Liquid crystal display (LCD) M In-plane switching (IPS) M Twisted nematic (TN) M Vertical alignment (VA) - Organic light-emitting diode (OLED) 1.3 - Hard disk drive (HDD)/solidstate drive (SSD) migration - HDD/SSD replacement - Wireless cards • Mobile display components • WiFi antenna connector/ placement • Camera/webcam • Microphone • Touch screen/digitizer • Inverter Given a scenario, set up and configure accessories and ports of mobile devices. • Connection methods - Universal Serial Bus (USB)/ USB-C/microUSB/miniUSB - Lightning - Serial interfaces - Near-field communication (NFC) - Bluetooth - Hotspot • Accessories - Touch pens - Headsets - Speakers - Webcam • Docking station • Port replicator • Trackpad/drawing pad 1.0 | Mobile Devices 1.4 Given a scenario, configure basic mobile-device network connectivity and application support. • Wireless/cellular data network (enable/disable) - 2G/3G/4G/5G - Hotspot - Global System for Mobile Communications (GSM) vs. code-division multiple access (CDMA) - Preferred Roaming List (PRL) updates • Bluetooth - Enable Bluetooth - Enable pairing - Find a device for pairing - Enter the appropriate PIN code - Test connectivity • Location services - Global Positioning System (GPS) services - Cellular location services • Mobile device management (MDM)/mobile application management (MAM) - Corporate email configuration - Two-factor authentication - Corporate applications • Mobile device synchronization - Account setup M Microsoft 365 M Google Workspace M iCloud - Data to synchronize M Mail M Photos M Calendar M Contacts M Recognizing data caps 2.0 Networking 2.1 Compare and contrast Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) ports, protocols, and their purposes. • Ports and protocols - 20/21 – File Transfer Protocol (FTP) - 22 – Secure Shell (SSH) - 23 – Telnet - 25 – Simple Mail Transfer Protocol (SMTP) - 53 – Domain Name System (DNS) - 67/68 – Dynamic Host Configuration Protocol (DHCP) - 80 – Hypertext Transfer Protocol (HTTP) - 110 – Post Office Protocol 3 (POP3) 2.2 - 137/139 – Network Basic Input/ Output System (NetBIOS)/ NetBIOS over TCP/IP (NetBT) - 143 – Internet Mail Access Protocol (IMAP) - 161/162 – Simple Network Management Protocol (SNMP) - 389 – Lightweight Directory Access Protocol (LDAP) - 443 – Hypertext Transfer Protocol Secure (HTTPS) - 445 – Server Message Block (SMB)/Common Internet File System (CIFS) - 3389 – Remote Desktop Protocol (RDP) • TCP vs. UDP - Connectionless M DHCP M Trivial File Transfer Protocol (TFTP) - Connection-oriented M HTTPS M SSH Compare and contrast common networking hardware. • Routers • Switches - Managed - Unmanaged • Access points • Patch panel • Firewall • Power over Ethernet (PoE) - Injectors - Switch - PoE standards • Hub • • • • • Cable modem Digital subscriber line (DSL) Optical network terminal (ONT) Network interface card (NIC) Software-defined networking (SDN) 2.3 Compare and contrast protocols for wireless networking. • Frequencies - 2.4GHz - 5GHz • Channels - Regulations - 2.4GHz vs. 5GHz • Bluetooth 2.4 • Long-range fixed wireless - Licensed - Unlicensed - Power - Regulatory requirements for wireless power • NFC • Radio-frequency identification (RFID) Summarize services provided by networked hosts. • Server roles - DNS - DHCP - Fileshare - Print servers - Mail servers - Syslog - Web servers - Authentication, authorization, and accounting (AAA) 2.5 • 802.11 - a - b - g - n - ac (WiFi 5) - ax (WiFi 6) • Internet appliances - Spam gateways - Unified threat management (UTM) - Load balancers - Proxy servers • Legacy/embedded systems - Supervisory control and data acquisition (SCADA) • Internet of Things (IoT) devices Given a scenario, install and configure basic wired/wireless small office/home office (SOHO) networks. • Internet Protocol (IP) addressing - IPv4 M Private addresses M Public addresses - IPv6 - Automatic Private IP Addressing (APIPA) - Static - Dynamic - Gateway 2.6 Compare and contrast common network configuration concepts. • DNS - Address M A M AAAA - Mail exchanger (MX) - Text (TXT) M Spam management (i) DomainKeys Identified Mail (DKIM) (ii) Sender Policy Framework (SPF) (iii) Domain-based Message Authentication, Reporting, and Conformance (DMARC) 2.7 Compare and contrast Internet connection types, network types, and their features. • Internet connection types - Satellite - Fiber - Cable - DSL - Cellular - Wireless Internet service provider (WISP) 2.8 • DHCP - Leases - Reservations - Scope • Virtual LAN (VLAN) • Virtual private network (VPN) • Network types - Local area network (LAN) - Wide area network (WAN) - Personal area network (PAN) - Metropolitan area network (MAN) - Storage area network (SAN) - Wireless local area network (WLAN) Given a scenario, use networking tools. • Crimper • Cable stripper • WiFi analyzer • Toner probe • Punchdown tool • Cable tester • Loopback plug • Network tap 3.0 Hardware 3.1 Explain basic cable types and their connectors, features, and purposes. • Network cables - Copper M Cat 5 M Cat 5e M Cat 6 M Cat 6a M Coaxial M Shielded twisted pair (i) Direct burial M Unshielded twisted pair - Plenum - Optical M Fiber - T568A/T568B • Peripheral cables - USB 2.0 - USB 3.0 - Serial - Thunderbolt • Video cables 3.2 - High-Definition Multimedia Interface (HDMI) - DisplayPort - Digital Visual Interface (DVI) - Video Graphics Array (VGA) • Hard drive cables - Serial Advanced Technology Attachment (SATA) - Small Computer System Interface (SCSI) - External SATA (eSATA) - Integrated Drive Electronics (IDE) • Adapters • Connector types - RJ11 - RJ45 - F type - Straight tip (ST) - Subscriber connector (SC) - Lucent connector (LC) - Punchdown block - microUSB - miniUSB - USB-C - Molex - Lightning port - DB9 Given a scenario, install the appropriate RAM. • RAM types - Virtual RAM - Small outline dual inline memory module (SODIMM) - Double Data Rate 3 (DDR3) - Double Data Rate 4 (DDR4) - Double Data Rate 5 (DDR5) - Error correction code (ECC) RAM • • • • Single-channel Dual-channel Triple-channel Quad-channel 3.3 Given a scenario, select and install storage devices. • Hard drives - Speeds M 5,400rpm M 7,200rpm M 10,000rpm M 15,000rpm - Form factor M 2.5 M 3.5 3.4 • SSDs - Communications interfaces M Non-volatile Memory Express (NVMe) M SATA M Peripheral Component Interconnect Express (PCIe) - Form factors M M.2 M mSATA • Drive configurations - Redundant Array of Independent (or Inexpensive) Disks (RAID) 0, 1, 5, 10 • Removable storage - Flash drives - Memory cards - Optical drives Given a scenario, install and configure motherboards, central processing units (CPUs), and add-on cards. • Motherboard form factor - Advanced Technology eXtended (ATX) - Information Technology eXtended (ITX) • Motherboard connector types - Peripheral Component Interconnect (PCI) - PCI Express (PCIe) - Power connectors - SATA - eSATA - Headers - M.2 • Motherboard compatibility - CPU sockets M Advanced Micro Devices, Inc. (AMD) M Intel - Server - Multisocket - Desktop - Mobile • Basic Input/Output System (BIOS)/Unified Extensible Firmware Interface (UEFI) settings - Boot options - USB permissions - Trusted Platform Module (TPM) security features - Fan considerations - Secure Boot - Boot password • Encryption - TPM - Hardware security module (HSM) • CPU architecture - x64/x86 - Advanced RISC Machine (ARM) - Single-core - Multicore - Multithreading - Virtualization support • Expansion cards - Sound card - Video card - Capture card - NIC • Cooling - Fans - Heat sink - Thermal paste/pads - Liquid 3.5 Given a scenario, install or replace the appropriate power supply. • Input 110-120 VAC vs. 220-240 VAC • Output 3.3V vs. 5V vs. 12V • 20-pin to 24-pin motherboard adapter 3.6 Given a scenario, deploy and configure multifunction devices/ printers and settings. • Properly unboxing a device – setup location considerations • Use appropriate drivers for a given OS - Printer Control Language (PCL) vs. PostScript • Device connectivity - USB - Ethernet - Wireless 3.7 • Redundant power supply • Modular power supply • Wattage rating • Public/shared devices - Printer share - Print server • Configuration settings - Duplex - Orientation - Tray settings - Quality • Security - User authentication - Badging - Audit logs - Secured prints • Network scan services - Email - SMB - Cloud services • Automatic document feeder (ADF)/flatbed scanner Given a scenario, install and replace printer consumables. • Laser - Imaging drum, fuser assembly, transfer belt, transfer roller, pickup rollers, separation pads, duplexing assembly - Imaging process: processing, charging, exposing, developing, transferring, fusing, and cleaning - Maintenance: Replace toner, apply maintenance kit, calibrate, clean • Inkjet - Ink cartridge, print head, roller, feeder, duplexing assembly, carriage belt - Calibration - Maintenance: Clean heads, replace cartridges, calibrate, clear jams • Thermal - Feed assembly, heating element - Special thermal paper - Maintenance: Replace paper, clean heating element, remove debris - Heat sensitivity of paper • Impact - Print head, ribbon, tractor feed - Impact paper - Maintenance: Replace ribbon, replace print head, replace paper • 3-D printer - Filament - Resin - Print bed 4.0 Virtualization and Cloud Computing 4.1 Summarize cloud-computing concepts. • Common cloud models - Private cloud - Public cloud - Hybrid cloud - Community cloud - Infrastructure as a service (IaaS) - Software as a service (SaaS) - Platform as a service (PaaS) 4.2 • Cloud characteristics - Shared resources - Metered utilization - Rapid elasticity - High availability - File synchronization • Desktop virtualization - Virtual desktop infrastructure (VDI) on premises - VDI in the cloud Summarize aspects of client-side virtualization. • Purpose of virtual machines - Sandbox - Test development - Application virtualization M Legacy software/OS M Cross-platform virtualization • Resource requirements • Security requirements 5.0 Hardware and Network Troubleshooting 5.1 Given a scenario, apply the best practice methodology to resolve problems. • Always consider corporate policies, procedures, and impacts before implementing changes 1. Identify the problem - Gather information from the user, identify user changes, and, if applicable, perform backups before making changes - Inquire regarding environmental or infrastructure changes 5.2 2. Establish a theory of probable cause (question the obvious) - If necessary, conduct external or internal research based on symptoms 3. Test the theory to determine the cause - Once the theory is confirmed, determine the next steps to resolve the problem - If the theory is not confirmed, re-establish a new theory or escalate 4. Establish a plan of action to resolve the problem and implement the solution - Refer to the vendor’s instructions for guidance 5. Verify full system functionality and, if applicable, implement preventive measures 6. Document the findings, actions, and outcomes Given a scenario, troubleshoot problems related to motherboards, RAM, CPU, and power. • Common symptoms - Power-on self-test (POST) beeps - Proprietary crash screens (blue screen of death [BSOD]/ pinwheel) - Black screen No power Sluggish performance Overheating Burning smell - Intermittent shutdown Application crashes Grinding noise Capacitor swelling Inaccurate system date/time 5.3 Given a scenario, troubleshoot and diagnose problems with storage drives and RAID arrays. • Common symptoms - Light-emitting diode (LED) status indicators - Grinding noises - Clicking sounds 5.4 Bootable device not found Data loss/corruption RAID failure Self-monitoring, Analysis, and Reporting Technology (S.M.A.R.T.) failure - Extended read/write times - Input/output operations per second (IOPS) - Missing drives in OS Given a scenario, troubleshoot video, projector, and display issues. • Common symptoms - Incorrect data source - Physical cabling issues - Burned-out bulb 5.5 - - Fuzzy image Display burn-in Dead pixels Flashing screen - Incorrect color display Audio issues Dim image Intermittent projector shutdown Given a scenario, troubleshoot common issues with mobile devices. • Common symptoms - Poor battery health - Swollen battery - Broken screen - Improper charging Poor/no connectivity Liquid damage Overheating - Digitizer issues Physically damaged ports Malware Cursor drift/touch calibration 5.6 Given a scenario, troubleshoot and resolve printer issues. • Common symptoms - Lines down the printed pages - Garbled print - Toner not fusing to paper - Paper jams - Faded print - Incorrect paper size 5.7 - Paper not feeding Multipage misfeed Multiple prints pending in queue Speckling on printed pages Double/echo images on the print Incorrect color settings Grinding noise - Finishing issues M Staple jams M Hole punch - Incorrect page orientation Given a scenario, troubleshoot problems with wired and wireless networks. • Common symptoms - Intermittent wireless connectivity - Slow network speeds - Limited connectivity - Jitter - Poor Voice over Internet Protocol (VoIP) quality - Port flapping - High latency - External interference CompTIA A+ Core 1 (220-1101) Acronym List The following is a list of acronyms that appear on the CompTIA A+ Core 1 (220-1101) exam. Candidates are encouraged to review the complete list and attain a working knowledge of all listed acronyms as part of a comprehensive exam preparation program. Acronym AAA Definition Authentication, Authorization, and Accounting AC Alternating Current ACL Access Control List ADF Automatic Document Feeder AES Advanced Encryption Standard AP Access Point APFS Apple File System APIPA Automatic Private Internet Protocol Addressing APK Android Package ARM Advanced RISC [Reduced Instruction Set Computer] Machine ARP Address Resolution Protocol ATA Advanced Technology Attachment ATM Asynchronous Transfer Mode ATX Advanced Technology Extended AUP Acceptable Use Policy BIOS Basic Input/Output System BSOD Blue Screen of Death BYOD Bring Your Own Device CAD Computer-aided Design CAPTCHA Completely Automated Public Turing Test to Tell Computers and Humans Apart CD Compact Disc CDFS Compact Disc File System CDMA Code-Division Multiple Access CERT Computer Emergency Response Team CIFS Common Internet File System CMD Command Prompt CMOS Complementary Metal-Oxide Semiconductor CPU Central Processing Unit CRL Certificate Revocation List DC Direct Current DDoS Distributed Denial of Service DDR Double Data Rate DHCP Dynamic Host Configuration Protocol Acronym DIMM DKIM DMA DMARC DNS DoS DRAM DRM DSL DVI DVI-D ECC EFS EMI EOL eSATA ESD EULA exFAT ext FAT FAT12 FAT16 FAT32 FSB FTP GFS GPS GPT GPU GSM GUI GUID HAL HAV Definition Dual Inline Memory Module DomainKeys Identified Mail Direct Memory Access Domain-based Message Authentication, Reporting, and Conformance Domain Name System Denial of Service Dynamic Random-Access Memory Digital Rights Management Digital Subscriber Line Digital Visual Interface Digital Visual Interface-Digital Error Correcting Code Encrypting File System Electromagnetic Interference End-of-Life External Serial Advanced Technology Attachment Electrostatic Discharge End-User License Agreement Extensible File Allocation Table Extended File System File Allocation Table 12-bit File Allocation Table 16-bit File Allocation Table 32-bit File Allocation Table Front-Side Bus File Transfer Protocol Grandfather-Father-Son Global Positioning System GUID [Globally Unique Identifier] Partition Table Graphics Processing Unit Global System for Mobile Communications Graphical User Interface Globally Unique Identifier Hardware Abstraction Layer Hardware-assisted Virtualization Acronym HCL HDCP HDD HDMI HSM HTML HTTP HTTPS I/O IaaS ICR IDE IDS IEEE IMAP IOPS IoT IP IPS IPS IPSec IR IrDA IRP ISO ISP ITX KB KVM LAN LC LCD LDAP LED MAC MAM MAN MBR MDM MFA MFD MFP MMC MOU MSDS MSRA Definition Hardware Compatibility List High-bandwidth Digital Content Protection Hard Disk Drive High-Definition Multimedia Interface Hardware Security Module Hypertext Markup Language Hypertext Transfer Protocol Hypertext Transfer Protocol Secure Input/Output Infrastructure as a Service Intelligent Character Recognition Integrated Drive Electronics Intrusion Detection System Institute of Electrical and Electronics Engineers Internet Mail Access Protocol Input/Output Operations Per Second Internet of Things Internet Protocol Intrusion Prevention System In-plane Switching Internet Protocol Security Infrared Infrared Data Association Incident Response Plan International Organization for Standardization Internet Service Provider Information Technology eXtended Knowledge Base Keyboard-Video-Mouse Local Area Network Lucent Connector Liquid Crystal Display Lightweight Directory Access Protocol Light-emitting Diode Media Access Control/Mandatory Access Control Mobile Application Management Metropolitan Area Network Master Boot Record Mobile Device Management Multifactor Authentication Multifunction Device Multifunction Printer Microsoft Management Console Memorandum of Understanding Material Safety Data Sheet Microsoft Remote Assistance Acronym MX NAC NAT NDA NetBIOS NetBT NFC NFS NIC NTFS NVMe OCR OLED ONT OS PaaS PAN PC PCIe PCL PE PII PIN PKI PoE POP3 POST PPP PRL PSU PXE RADIUS RAID RAM RDP RF RFI RFID RJ11 RJ45 RMM RTO SaaS SAN SAS SATA Definition Mail Exchange Network Access Control Network Address Translation Non-disclosure Agreement Networked Basic Input/Output System NetBIOS over TCP/IP [Transmission Control Protocol/Internet Protocol] Near-field Communication Network File System Network Interface Card New Technology File System Non-volatile Memory Express Optical Character Recognition Organic Light-emitting Diode Optical Network Terminal Operating System Platform as a Service Personal Area Network Personal Computer Peripheral Component Interconnect Express Printer Command Language Preinstallation Environment Personally Identifiable Information Personal Identification Number Public Key Infrastructure Power over Ethernet Post Office Protocol 3 Power-on Self-Test Point-to-Point Protocol Preferred Roaming List Power Supply Unit Preboot Execution Environment Remote Authentication Dial-in User Service Redundant Array of Independent (or Inexpensive) Disks Random-access Memory Remote Desktop Protocol Radio Frequency Radio-Frequency Interference Radio-Frequency Identification Registered Jack Function 11 Registered Jack Function 45 Remote Monitoring and Management Recovery Time Objective Software as a Service Storage Area Network Serial Attached SCSI [Small Computer System Interface] Serial Advanced Technology Attachment Acronym SC SCADA SCP SCSI SDN SFTP SIM SIMM S.M.A.R.T. SMB SMS SMTP SNMP SNTP SODIMM SOHO SPF SQL SRAM SSD SSH SSID SSL SSO ST STP TACACS TCP TCP/IP TFTP TKIP Definition Subscriber Connector Supervisory Control and Data Acquisition Secure Copy Protection Small Computer System Interface Software-defined Networking Secure File Transfer Protocol Subscriber Identity Module Single Inline Memory Module Self-monitoring Analysis and Reporting Technology Server Message Block Short Message Service Simple Mail Transfer Protocol Simple Network Management Protocol Simple Network Time Protocol Small Outline Dual Inline Memory Module Small Office/Home Office Sender Policy Framework Structured Query Language Static Random-access Memory Solid-State Drive Secure Shell Service Set Identifier Secure Sockets Layer Single Sign-on Straight Tip Shielded Twisted Pair Terminal Access Controller Access-Control System Transmission Control Protocol Transmission Control Protocol/Internet Protocol Trivial File Transfer Protocol Temporal Key Integrity Protocol Acronym TLS TN TPM UAC UDP UEFI UNC UPnP UPS USB UTM UTP VA VDI VGA VLAN VM VNC VoIP VPN VRAM WAN WEP WISP WLAN WMN WPA WWAN XSS Definition Transport Layer Security Twisted Nematic Trusted Platform Module User Account Control User Datagram Protocol Unified Extensible Firmware Interface Universal Naming Convention Universal Plug and Play Uninterruptible Power Supply Universal Serial Bus Unified Threat Management Unshielded Twisted Pair Vertical Alignment Virtual Desktop Infrastructure Video Graphics Array Virtual LAN [Local Area Network] Virtual Machine Virtual Network Computer Voice over Internet Protocol Virtual Private Network Video Random-access Memory Wide Area Network Wired Equivalent Privacy Wireless Internet Service Provider Wireless LAN [Local Area Network] Wireless Mesh Network WiFi Protected Access Wireless Wide Area Network Cross-site Scripting