Chapter 1
Operating Systems
Course: 220 1202 Comptia A Exam Core 2
Subject: 220 1102 Comptia A Plus Exam Core 2
Chapter: Operating Systems
1. Boot Methods
Different methods can be used to start the OS installation process. Choosing the appropriate method depends on hardware configuration, the OS to be installed, and the resources available.
- USB: Installing an OS from a USB drive is one of the most common and convenient methods. It requires creating a bootable USB drive using tools like Rufus or the Windows Media Creation Tool. Real-Life Example: A technician creates a bootable USB drive to install Windows 10 on a new computer without an optical drive.
- Optical Media (CD/DVD): Older systems often use CDs/DVDs for OS installation. This method may be slower than USB but can be useful for legacy systems. Real-Life Example: Installing Windows 7 using an installation DVD on an older desktop computer.
- Network (PXE Boot): Preboot Execution Environment (PXE) allows a computer to boot from a network server. Often used in enterprise environments for mass deployments. Real-Life Example: A company uses PXE boot to install the OS on multiple workstations simultaneously, reducing installation time.
- Solid-State/Flash Drives: Some systems allow OS installation directly from solid-state drives (SSDs) or flash drives that contain bootable OS images.
- Internet-Based Installation: Some OS installations can be done over the internet, where the installation files are downloaded and installed directly. Real-Life Example: Installing a Linux distribution like Ubuntu directly from an internet-based installer.
- External/Hot-Swappable Drive: An OS can be installed from an external drive connected via USB or another interface, providing flexibility for laptops or systems without internal drives.
- Internal Hard Drive (Partition): This method involves using a recovery or installation partition on the internal hard drive to perform OS installation or recovery. Real-Life Example: A laptop with a built-in recovery partition allows users to restore the OS to factory settings.