The first domain for the A+ Essentials (220-701) exam is hardware, which focuses on teaching you to identify components and to demonstrate a basic knowledge of hardware technology. This domain is essential because it gives you a background for the other domains and also counts as 27% of the test score, the largest percentage of all the domains. It also includes the most objectives because today’s PCs have such a wide variety of hardware and technology:
The objectives for this domain are as follows:
1.1—Categorize storage devices and backup media
1.2—Explain motherboard components, types, and features
1.3—Classify power supplies ...