CompTIA A+ 220-801 - Prepare For The CompTIA A+ 220-801 Exam

Learn how electrostatic discharge can damage PC components and how to prevent it with grounding, anti-static wrist straps, mats, and anti-static bags in dry environments.

Identify and mitigate trip hazards, lift heavy objects with your legs, unplug equipment before work, and follow labeling and regulatory guidelines to protect personal safety.

Master material safety data sheets (MSDS) to safely handle and dispose of hazardous substances, including lithium batteries, per OSHA's hazard communications standards.

Identify the power supply unit, verify proper grounding and voltage switch, test for power delivery, and replace a faulty PSU as an FRU without opening it.

Regulate temperature, humidity, and airborne particles to protect computer systems; maintain around 72°F and humidity 30-40 percent, and remove dust with dry compressed air or a non-static vacuum.

Discover how BIOS, a ROM-based collection of startup programs, helps the CPU recognize RAM, drives, and expansion slots, and kick-start your computer before system configuration.

Explore how the BIOS uses read-only ROM and CMOS to configure hardware settings, how firmware upgrades update the BIOS, and how to enter setup to adjust RAM and disks.

Enter the bios utility, navigate with arrow keys to adjust boot order and security options, and save or discard changes to boot your computer.

Explore how the motherboard acts as the computer's skeleton, with traces and buses linking RAM, CPU, and expansion slots.

Explore motherboard form factors from standard ATX to micro ATX and flex ATX, and learn compact ITX variants—mini ITX, nano ITX, and pico ITX with their power and cooling traits.

Explore the evolution of expansion slots and the expansion bus on the PC, enabling network, display, and graphics cards, with growing data transfer speeds and wider buses.

Learn about expansion slot types like PCI, PCIe, PCI-X, AGP, mini PCI, and CNR, and how they connect cards for NICs, graphics, and storage.

Discover PCI Express, the latest fast expansion slot with serial lanes and growing configurations, plus mini PCI for laptops and the obsolescence of CNR alongside AGP graphics.

Learn to power a PC by converting AC to DC with power supply unit, test outlets with multimeter, and protect with a surge suppressor and an uninterruptible power supply.

Compare CRT, LCD, projector, and plasma displays, noting CRT’s electron gun and phosphor, LCD backlight and inverter, native resolution, and projector lumens and throw; beware plasma burn in and overscan.

Explore how RAM, as volatile random access memory, loads active programs from the hard disk into memory, with DRAM as the common type and capacity and speed governing performance.

Learn the five ram types, including sdram, rdram, ddr sdram, and ddr2, and how pins, key notches, and the system clock drive memory performance.

Learn RAM types from Rambus legacy to DDR variants; examine proprietary licensing, DDR, DDR2, and DDR3 differences in pins, speed, and power efficiency.

Insert a compatible card into a motherboard expansion slot to add functionality. Secure the card firmly, install drivers, and verify operation via device manager and operating system support.

Compare RAM's fast access with the need for nonvolatile storage that survives power loss. Learn about fixed versus removable storage, including hard disks, memory cards, USB drives, and optical disks.

Explore the evolution of optical drives from CDs to Blu-ray, including read and write speeds, pits, and the use of double-sided and dual-layer DVDs to expand capacity.

Explore how combo drives and burners support multiple dvd formats—dvd-r, dvd-rw, dvd+r, dvd+rw, and dvd-rom—while meeting the A+ exam objectives across different players.

Explore flash memory devices, focusing on USB thumb drives and memory cards, their nonvolatile storage, formats like CompactFlash and SD, and practical use for quick backups and file transfers.

Compare flash drive formats, including compact flash, smart media, secure digital, memory sticks, and xd cards; note standard sd, sdhc, sdxc capacities and the mini and micro variants with adapters.

Explore hard drive basics, including internal HDD and SSD differences, platters and spindles, read/write heads and actuation, tracks and sectors, and how defragmentation and spindle speed affect performance.

Identify hard drive interfaces and connections from pata to sata, including external e-sata, and understand how data and power paths connect drives to the motherboard and cpu.

Explain raid concepts, focusing on raid 0 striping for speed, raid 1 mirroring for fault tolerance, raid 5 parity for protection, and raid 1+0 as a combined approach.

Learn how SCSI uses daisy chaining to connect up to 15 devices to a single host adapter, with unique SCSI IDs and proper termination.

Explore the connectors, cables, and pins essential for the CompTIA A+ 220-801 exam, focusing on cpu sockets, display and device connectors, and recognizing them on motherboards.

Identify CPU sockets and their motherboards, understand how CPUs fit into sockets with pins or pads, and memorize Intel and AMD socket models and pin counts for the 220-801 exam.

Explore Intel and AMD cpu sockets, their pin counts, and compatibility, including LGA 775, LGA 1155, LGA 1366, AM2, AM3, AM2+, FM1, and socket F (1207 pins).

Trace the evolution of cpu characteristics from early clock speeds to modern multi-core processors, covering cycles per second, megahertz and gigahertz, caches, hyper-threading, virtualization, architecture, and the integrated gpu.

Learn how the cpu caches L1, L2, and L3 speed data access, plus hyper-threading, virtualization support, 32-bit vs 64-bit addressing, and integrated graphics processing units.

Discover how CPU cooling uses heat sinks, fans, and liquid cooling to prevent overheating and protect motherboard components, with heat transfer, thermal compound, and liquid cooling basics.

Identify ten display connectors used to link monitors to computers, including dvi variants, displayport, hdmi and mini hdmi. Recognize rca, bnc, vga (hd 15), rj-45, rj-11, and mini-din-6 visually.

Explore the ten standard PC connectors, focusing on parallel vs serial transfer, PATA/IDE versus SATA, including external SATA and SATA I–III speeds, with cable and motherboard connector distinctions.

Identify usb connectors by type a, type b, mini usb, and micro a and micro b. Know usb speeds: 12 mbps, 480 mbps, up to 5 gbps for usb 3.0.

Explore Firewire, a serial bus standard for high-speed data transfer, with Apple's implementation and the four versions (400, 800, 1600, 3200), exam-focused on 400 and 800.

Explore network cables and connectors for the CompTIA A+ 220-801 exam, including twisted pair, coaxial, and fiber optic cables, and LAN topologies such as bus, star, ring, mesh, and hybrid.

Master twisted pair cable, including unshielded and shielded types, and their EMI considerations. Recognize Cat 3 through Cat 6 speeds and the plenum versus non-plenum cabling for safe installations.

Explore coaxial cable basics, including the center copper wire, insulation, shielding to reduce emi, 75 ohm impedance, and identify RG-59, RG-6, F-type, and BNC connectors used in cable modems.

Explore fiber optic cable fundamentals, using light pulses for higher throughput and distance with lower electromagnetic interference. Compare multimode and single mode fibers, their signaling, and connectors sc and st.

Learn about bus, star, ring, mesh, hybrid, and wireless network topologies. Distinguish logical topologies from physical topologies to understand how networks are designed and implemented.

Understand the bus topology in early LANs, where devices share a single central cable and broadcast to all nodes, offering simplicity but facing growth and single-point failure risks.

Learn how the ring topology uses a single token traveling in one direction to move data, noting advantages like no server and risks like one computer problem disrupting entire network.

Explore the star topology, the most common network design, where every computer connects to a central hub or switch, enabling efficient data transfer and easy expansion.

Explore mesh networks, where every device can connect directly to others, enabling multiple routes, no single point of failure, and high traffic, but incurring high cost and complex administration.

Master the hybrid topology that combines star networks with a bus backbone to boost reliability, reduce congestion, and scale while balancing complexity and cost.

Compare peer-to-peer and client-server networks, outlining the limitations of each as networks grow, including centralised shared folders, domain logins, backups, and server-based administration.

Understand infrastructure and ad hoc wireless modes, that wireless adapters act as both transmitter and receiver, and how CSMA/CA with TCP/IP data framing enables collision-free wireless networks.

Explore IEEE wireless standards, including 802.11a/b/g, the shift from 2.4 GHz to 5 GHz, throughput up to 54 Mbps, and real-world ranges for the CompTIA A+ exam.

Explore 802.11a, b, g, and n, mimo, 2.4 and 5 ghz, backward compatibility, and a study sheet to memorize and recreate the chart for the exam.

Explore the evolution of wireless encryption types from WEP to WPA and WPA2, highlighting vulnerabilities and why WPA2, using the Advanced Encryption Standard, is the current security choice.

Explore basic wireless security techniques, including SSID broadcasting and MAC filtering, and learn why these measures offer limited defense and how attackers spoof MAC addresses.

Explore the TCP/IP suite basics, including version 4 and version 6, open, scalable, and reliable networking with simple addressing used on the internet and private networks, for exam readiness.

Explore the fundamentals of tcp/ip addresses, including a 32-bit address, four numbers separated by periods, classful a/b/c ranges, and the use of subnet masks with a default gateway.

Explore how tcp/ip addresses are divided into network and host parts using classful subnet masks, including class a, b, and c with binary insights.

Explain IP version 6, a 128-bit address space replacing IPv4’s 32-bit limit, with eight groups of four hexadecimal digits and built-in routing, security, multicasting, and quality of service capabilities.

Explore public vs private IPv4 addresses and APIPA, including private ranges 10.0.0.0/8, 172.16.0.0–172.31.255.255, 192.168.0.0–192.168.255.255, and APIPA 169.254.0.0/16, with routing implications and automatic address assignment.

Explore static and dynamic addressing in tcap ip addressing, comparing permanent static ip addresses used for servers and devices with dynamic ip addressing assigned automatically by a dcp server.

Explore how the dynamic host control protocol (dcp) automates IP addressing in a client-server network, allocating IP addresses, subnet masks, default gateways, DNS options, and automatic configurations.

Compare tcp and udp to choose the right data transfer method; explain connection oriented delivery, acknowledgments, and fast, less reliable transmission for voice, video, and streaming.

Explains how tcp and udp ports manage traffic with port numbers 0–65535, including well-known, registered, and dynamic ports; uses http 80, https 443, and remote desktop 3389.

Explore key protocols and port numbers for the CompTIA A+ exam, including ftp 20/21, ssh 22, http 80, smtp 25, https 443, dns 53, dhcp 67/68, and smb 445.

Compare hubs and switches, explain how hubs broadcast to all ports and create unnecessary traffic, while switches learn port destinations and create point-to-point connections for efficient, full bandwidth delivery.

Learn how routers route traffic between networks and segregate data between LANs, guided by IP addresses, subnet masks, and default gateways.

Understand how modems convert digital signals to analog and back for dial-up networking, track baud rates from 2400 to 33.6 kbps, and note broadband and DSL replacement.

Explore NAS basics, differences from DAS and servers, and how NAS devices provide easy RAID 5 setups, cloud access, and simple network shares.

Identify six essential network tools—crimper, multimeter, toner probe, cable tester, loopback plug, and punch down tool—and understand how to use them for exam prep and practical troubleshooting.

Compare portable computing by detailing desktop replacement laptops, netbooks, and ultrabooks, including keyboard size, screen, RAM, and power versus portability, with the MacBook Air as an example.

Examine laptop expansion via exterior ports, mirroring desktop expansion. Identify expansion types—pc card, express card, and general purpose ports—and note USB, SD slots, and serial ports.

Explore laptop displays from 10.1 to 17.3 inches, with WXGA and 1366x768 resolutions across LCD, plasma, and OLED, including LCD backlighting, matte vs glossy screens, and energy efficiency.

Explain the difference between docking stations and port replicators, noting that port replicators provide USB-connected ports, while docking stations add drives, PCI slots, and a proprietary connection.