Physical memory is the amount of ram installed in the

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• Physical memory is the amount of RAM installed in the system. • The Resource Monitor shows how much memory is in use at any time.
Objective 6.6 Evaluate whether adding RAM to a system is desirable.
Evaluating the Storage Subsystem Objective 6.7 Classify and describe the major types of nonvolatile storage drives.
• An SSHD drive is a combination of both a mechanical hard drive and an SSD into a single device. • 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. 6.2 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 graphics workload. • 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 organizations. • 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 7.1: How Networks Function • A computer network is simply two or more computers that are connected using software and hardware so they can communicate.
• Advantages of networks include allowing users to share an Internet connection, share printers and other peripheral devices, share files, and communicate with computers regardless of their operating system. • Disadvantages for larger networks are that they require administration and that they may require costly equipment. Network Architectures • Wired networks use various types of cable to connect nodes, including twisted-pair cable,

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