6.1 What medium is used to transfer Wi-Fi data? 6.1.2 Give TWO reasons why there may be a need for many access points in the network environment of the mall - English General - NSC Information Technology - Question 6 - 2021 - Paper 2

1. To increase the range of the Wi-Fi signal, ensuring coverage across the entire mall, as a single access point may not adequately cover a large area.
2. To manage high traffic; many users in a shopping mall can lead to congestion on a single access point, affecting performance and reducing bandwidth.

The most likely device to run this app is a mobile device, such as a smartphone or tablet, as these devices are designed for user portability and interaction.

The term 'application of the Web' refers to the trend where mobile devices increasingly use apps instead of traditional web browsers to access web services directly, providing a more streamlined user experience.

Defensive programming is a practice where developers anticipate potential problems and write code to handle unforeseen circumstances, ensuring the software's robustness and reliability.

1. Input validation: This technique checks that the data entered by users meets certain criteria before further processing.
2. Error handling: This involves implementing systematic ways to handle unexpected errors, ensuring the application doesn't crash and provides meaningful feedback to the user.

A common encryption protocol used for encrypting private data over the internet is HTTPS, which stands for Hypertext Transfer Protocol Secure.

Public key encryption uses a pair of keys: a public key, which is shared with everyone, and a private key, which is kept secret by the user. Data encrypted with the public key can only be decrypted using the corresponding private key, ensuring secure communication.

Location-based computing is a technology that processes information based on a user's geographical location, often using GPS and other location services to tailor content and services.

An example of location-based computing in a mall is a mobile app that sends notifications to users about sales and promotions when they are near specific stores, enhancing the shopping experience.

A white hat hacker is an ethical hacker who tests and secures systems to improve security without causing harm, whereas a black hat hacker engages in malicious activities, exploiting vulnerabilities for personal gain or damage.

A DDoS attack, or Distributed Denial of Service attack, overwhelms a server with traffic from multiple sources, causing it to become unresponsive and rendering services inaccessible to legitimate users.

1. Loss of revenue due to decreased trust from customers and potential fines.
2. Data loss, which can lead to operational disruptions and damage to reputation.

A virtual office is a service that provides businesses with a physical address and office-related services without the need for a dedicated physical workspace, allowing remote work and flexibility.

The term used to indicate that an employee uses technology to work from home is 'telecommuting.'

I would recommend using a noise-cancelling microphone or headphones to help block out background noise, enhancing audio quality during virtual meetings.

One video conferencing platform that can be used for meetings is Zoom, which offers features suited for virtual collaboration.

An example of a cloud service that could be used is Google Drive, which allows for easy storage and sharing of meeting recordings.

Virtual reality immerses the user in a completely digital environment, blocking out the physical world, while augmented reality overlays digital information onto the real world, enhancing the user's perception of their environment.

The app can enhance the shopping experience by allowing users to visualize products in 3D within the mall before making a purchase, facilitating better decision-making.

1. GPS sensor, which provides location data for location-based services.
2. Camera sensor, which can be used for augmented reality experiences.