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

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

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 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.

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.

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.

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.

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.

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.

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.