IB Digital Society 3.4 Networks and the Internet Questionbank

The Impact of Cloud Networks on Data Accessibility

Cloud networks allow for data storage and access over the internet, making data accessible from anywhere. This accessibility supports remote work, file sharing, and collaboration but also raises concerns about data security and control over personal information.

The Role of Firewalls in Network Security

Firewalls are critical for network security, acting as barriers between internal networks and external threats. They control incoming and outgoing traffic, protecting against unauthorized access and cyber attacks. However, configuring firewalls effectively can be challenging, especially in large organizations.

The Ethical Implications of Malicious Software in Personal Devices

Malicious software (malware) is a significant threat to users of personal devices, as it can steal sensitive information, disrupt services, or even cause financial losses. With increased connectivity, devices are more vulnerable to these attacks, raising ethical questions about responsibility in cybersecurity.

On 23 December 2011, an e-card with the subject ‘Merry Christmas!’ was supposedly sent by the US President’s office (from ‘jeff.jones@whitehouse.org’) to a massive number of recipients. Recipients who clicked to download and open the card (a .zip file) saw an animated Christmas tree while a trojan virus accessed their saved documents and passwords, and uploaded them to a server in Belarus.

Source A: Types of Computing Networks and Their Applications

Computing networks enable connectivity across different scales and purposes, from Local Area Networks (LANs) within buildings to Wide Area Networks (WANs) spanning cities. Virtual Private Networks (VPNs) enhance security, while Client-Server and Peer-to-Peer (P2P) architectures support various communication methods.

For instance, a VPN can secure remote employee access to a company’s intranet, and LANs connect devices within a corporate office to share resources efficiently.

Source B: Essential Components of Computing Networks

The effectiveness of networks depends on critical components such as clients, servers, routers, and switches. Modems connect devices to the internet, while network interfaces enable devices to join a network. These elements, together with wired and wireless media, make data transmission feasible across distances.

For example, a modem connects a home router to an internet service provider (ISP), enabling users to access the internet and local network resources.

Source C: Transmission Media in Networks: Wired vs. Wireless

Networks rely on transmission media for data transfer. Wired media (e.g., Ethernet and fiber-optic cables) provide high-speed, reliable connections, while wireless media (e.g., Wi-Fi and cellular networks) enable mobility. Each medium has specific advantages depending on the application.

For instance, fiber-optic cables support high-speed internet in metropolitan areas, while Wi-Fi enables device connectivity within homes and offices without physical cabling.