12 Questions
What part of a computer hardware architecture coordinates/manage virtual machines?
Hypervisor
Which type of cloud computing service allows complete control over infrastructure and operates on a pay-as-you-use model?
IAAS
What type of storage device is used in computers to store and preserve accumulated data?
Primary Storage
In cloud computing, what does the acronym PAAS stand for?
Platform as a Service
Which type of memory is connected to the CPU in a computer system?
Main Memory
What is the main benefit of cloud computing related to 'Global scale'?
Reliability
Which of the following is an example of a local area network (LAN)?
A network of devices in a home
What are the objectives of Security?
Confidentiality, Integrity, Availability
Which of the following is a benefit of a LAN?
Sharing printers
What is an example of a secondary storage device?
Hard Disk
Which of the following is a phase of Software Development Life Cycle (SDLC)?
Deploy
What is the purpose of data encryption?
To protect data from unauthorized access
Study Notes
Hardware Components
- A computer consists of Central Processing Unit (CPU), Main Memory, Secondary Memory, I/O Devices, and Network Connection
- I/O Devices include screen, keyboard, mouse, microphone, speaker, touchpad, etc.
Virtual Machines (VMs)
- A single computer can be divided into multiple virtual computers, each running its own Operating System (OS) and behaving like an independent computer
- A hypervisor is the software layer that coordinates and manages VMs
Cloud Computing
- Cloud Computing is the delivery of computing services over the internet (cloud)
- Benefits of Cloud Computing include: Cost, Speed, Productivity, Global scale, Performance, Reliability, and Security
- IAAS (Infrastructure as a Service) allows complete control over infrastructure and operates on a pay-as-you-use model
- PAAS (Platform as a Service) is a platform for developers to program, test, run, and maintain applications
- SAAS (Software as a Service) is an application that interfaces between the cloud and user
Storage Devices
- Storage devices can be divided into four parts: Primary Storage, Secondary Storage, Tertiary Storage, and Off-line Storage
- Main memory is connected to the CPU
- Examples of storage devices include hard disks (Secondary Storage) and USB flash drives (removable storage devices)
Networking
- A Local Area Network (LAN) is a collection of devices connected together in one physical location
- Benefits of a LAN include sharing printers
- Most home networks are peer-to-peer
- The internet is a global network that connects billions of computers across the world
- Advantages of the internet include instant messaging, cloud computing, online shopping, and online banking
- Network mapping is used to simplify network monitoring and swiftly pinpoint network faults
Security
- Software security protects software programs from malicious threats, such as viruses or malware
- Cybersecurity threats include trojan horse and ransomware attacks
- Objectives of Security include Confidentiality, Integrity, and Availability
- Data encryption transforms readable data into an unreadable, protected format
- Implementing two-factor authentication requires a user to provide two pieces of information to log into their account
Test your knowledge on the components of computer hardware architecture such as Central Processing Unit, Main Memory, Secondary Memory, I/O Devices, and Network Connection. Learn about virtual machines, operating systems, and the role of a hypervisor in managing VMs. Explore the functionalities of various I/O devices like screens, keyboards, and speakers in a computer system.
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