• An SSHD drive is a combination of both a mechanical hard drive and an SSD into a single
• Optical drives, like Blu-ray and DVDs, use a laser to read pits and bumps on plastic discs.
• Your storage needs will depend on the number and types of programs and data you use.
• It may be better to have several drives connected, either in RAID 0 for more speed or in
RAID 1 for instantaneous backup protection.
Evaluating Other Subsystems and Making a Decision
• A video card translates binary data into images that are displayed on a monitor.
• A video card has specialized video memory that is very fast. Some systems have multiple video
cards for even greater performance.
• A video card has a graphics processing unit (GPU), which helps the CPU by handling the
• One video card can support multiple monitors.
• A sound card can support 3-D sound as well as surround sound like Dolby 7.1.
• Dolby 7.1 surround sound has one speaker for low frequency tones and seven additional
speakers for a full, immersive experience.
• An audio MIDI interface unit allows you to connect musical instruments, microphones, and
headphones to your computer.
Evaluating System Reliability and Moving On
• There are many regular maintenance steps you should take to keep your system reliable. They
include using an antivirus program, adware removal software, clearing out unnecessary files,
and running a disk defragmenter.
• A used computer can be recycled through several manufacturers or through nonprofit
• To safely recycle or donate a computer, you must first remove all applications and personal
data. There are options in Windows to help with this.
Chapter 7: Networking: Connecting Computing Devices
How Networks Function
• A computer network is simply two or more computers that are connected using software and
hardware so they can communicate.