Theory Revision - CAT Term 2 - Grade 11

Summary

This educational video script offers a comprehensive review for grade 11 students, covering key computer science topics from term two. It delves into storage memory, processing, and the distinction between primary and secondary memory. The script explains computer components like RAM, hard drives, and the booting process, while also exploring network concepts, including LANs, WLANs, and the significance of network security and ethical usage. Additionally, it touches on the importance of effective website design, data processing, and the role of questions in problem-solving. The script serves as a valuable study aid, preparing students for exams and practical applications.

Takeaways

• 💾 Remember the difference between primary memory (RAM) and secondary memory (hard drive) when discussing PC specifications.
• 🖥️ Understand the components of a desktop PC, including the ATX case, PSU, motherboard, CPU model, memory, optical drive, operating system, and peripherals like the keyboard and monitor.
• 🌐 Know the advantages and disadvantages of online storage and be able to explain the concept, including examples.
• ☁️ Distinguish between online storage, which is about file storage, and cloud computing, which involves running programs based on the cloud.
• 📚 Be aware of backup strategies and the difference between a backup, which is a copy, and an archive, which involves moving files for later use.
• 💻 Learn about the booting process of a computer, starting from the ROM instructions to loading the operating system.
• 🌐 Grasp the concepts of LAN (Local Area Network) and WLAN (Wireless LAN), and understand the differences and use cases.
• 🔑 Know the basics of network security, including the importance of strong passwords and the ethical use of networks.
• 🌐 Recognize the signs of being connected to a network, such as seeing additional drives or access to shared printers.
• 🛠️ Be familiar with network components like the network interface controller (NIC), switches, and the impact of data transmission speeds on network performance.

Q & A

What is the primary memory in a computer?

The primary memory in a computer is RAM (Random Access Memory), which is used for temporary data storage while the computer is running.

What is the difference between primary and secondary memory?

Primary memory, or RAM, is used for temporary data storage during operation, while secondary memory, such as hard drives, is used for long-term data storage.

What are the advantages and disadvantages of online storage?

Advantages of online storage include accessibility from anywhere with an internet connection and off-site backups for security. Disadvantages include potential data privacy issues and reliance on internet connectivity.

How does cloud computing differ from online storage?

Online storage involves storing files on remote servers, while cloud computing refers to using applications and services that are hosted on the internet rather than running on a local device.

What is the role of a backup in data management?

A backup is a copy of data made to prevent data loss in case of corruption, deletion, or other issues. It ensures that important files can be restored if the original is compromised.

What is the purpose of the booting process in a computer?

The booting process is the initialization of a computer's hardware and software systems when it starts up, allowing the operating system to load and the computer to become operational.

What is the difference between a LAN and a WLAN?

A LAN (Local Area Network) is a wired network confined to a specific area, while a WLAN (Wireless Local Area Network) is a wireless network that allows devices to connect without physical cables.

Why might a wired connection be preferred over a wireless one?

A wired connection is often preferred because it generally provides faster and more stable internet speeds compared to wireless connections, which can be affected by interference and distance.

What is an intranet and how does it differ from the internet?

An intranet is a private network within an organization that mimics the functionality of the internet but is not publicly accessible. It is typically used for internal communication and resource sharing.

What is the significance of network security policies?

Network security policies define the rules and practices for the secure use of a network. They help protect sensitive data and ensure that only authorized users have access to network resources.

Why is it important to have a strong password for network access?

A strong password helps prevent unauthorized access to a network and its resources. It should include a mix of uppercase and lowercase letters, numbers, and special characters, and should not be easily guessable.