4 Networks and the effects of using them (3)
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Information Communication Technology ICT
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1.
Explain why it is important to scan data and software for viruses and malware before downloading and installing them. Describe at least three potential consequences of not performing a scan.
It is crucial to scan data and software for viruses and malware before downloading and installing them because these files can contain malicious code that can harm a computer system. Malware can range from annoying pop-ups to severe data loss and system corruption. Here are three potential consequences of not performing a scan:
- Data Loss: Malware can delete, encrypt, or steal important files, including documents, photos, and personal information.
- System Instability: Malware can cause the computer to crash, freeze, or become unstable, leading to data corruption and potential hardware damage.
- Security Breaches: Malware can create backdoors that allow hackers to gain unauthorized access to the computer and network, potentially leading to identity theft or financial loss.
Scanning helps identify and remove these threats, protecting the computer and user data.
2.
Compare and contrast the hardware and software requirements for setting up a video conference using a software-based solution (e.g., Zoom, Microsoft Teams) versus a dedicated hardware-based video conferencing system. Consider cost, ease of use, and scalability.
Software-based solutions (Zoom, Teams):
- Hardware: Requires a computer or laptop with a webcam, microphone, and speakers (or headphones). A stable internet connection is essential.
- Software: Requires the installation of the specific video conferencing application.
- Cost: Generally lower initial cost, often with free versions available for basic use. Subscription fees may apply for advanced features.
- Ease of Use: Typically very user-friendly with intuitive interfaces.
- Scalability: Highly scalable, easily accommodating a large number of participants.
Dedicated hardware-based systems:
- Hardware: Requires a dedicated video conferencing unit, display screen, and potentially additional peripherals (e.g., wireless microphones).
- Software: Includes the operating system and specialized video conferencing software built into the unit.
- Cost: Higher initial cost due to the dedicated hardware.
- Ease of Use: Can be slightly more complex to set up and manage, requiring some technical knowledge.
- Scalability: Scalability is limited by the number of units available.
Comparison: Software-based solutions offer greater flexibility and scalability at a lower cost, while dedicated hardware systems provide a more robust and professional solution for larger conferences. The choice depends on the specific needs and budget of the organization.
3.
Create a table comparing and contrasting the key characteristics of LAN, WLAN, and WAN. Your table should include the following criteria: Area covered, Speed, Cost, Security, and Typical Use.
Characteristic | LAN | WLAN | WAN |
Area Covered | Small (e.g., home, office) | Small (e.g., home, office) | Large (e.g., city, country, global) |
Speed | Fast | Moderate | Slow |
Cost | Low | Low | High |
Security | Good (with proper configuration) | Moderate (requires strong encryption) | Variable (depends on technology used) |
Typical Use | Connecting devices in a home or office. Sharing files and printers. | Providing wireless internet access. Connecting laptops and mobile devices. | Connecting branch offices of a company. The Internet. Connecting networks across different countries. |