6.1 The diagram below is an example of a WLAN - NSC Information Technology - Question 6 - 2021 - Paper 2

1. To increase the range: having multiple access points can ensure better coverage across a large area, minimizing dead zones.

2. High traffic management: in scenarios with many users, additional access points can help distribute the network load, enhancing performance and reducing congestion.

The type of device most likely to run this app would be a mobile device, such as a smartphone or tablet.

The term 'application of the Web' refers to using web apps to access services directly through browsers, rather than relying on traditional software applications.

Defensive programming is a programming practice designed to ensure that the software continues to function under unforeseen circumstances. It involves writing code that anticipates potential errors and handles them gracefully.

1. Range checking: Ensuring that input data falls within a specified range to prevent errors or unexpected behavior.

2. Error handling: Implementing try/catch blocks to manage exceptions and maintain application stability.

A commonly used encryption protocol is HTTPS (Hypertext Transfer Protocol Secure), which ensures secure communication over a computer network.

Public key encryption involves two keys: a public key, which is shared with anyone, and a private key, which is kept secrets by the user. Data encrypted with the public key can only be decrypted by the corresponding private key, ensuring secure communication.

Location-based computing refers to computer processing that takes into account the physical location of people and objects and uses this information during processing.

An example is providing specific advertisements or notifications when a user enters a shop, enhancing their shopping experience.

A white hat hacker tests security systems without causing damage. In contrast, a black hat hacker exploits or damages systems for malicious purposes.

A DDoS (Distributed Denial-of-Service) attack overwhelms a server or network with traffic, rendering it unresponsive and unavailable for legitimate users.

1. Loss of revenue due to service interruptions.

2. Damage to reputation, leading to loss of customer trust.

A virtual office is a fixed physical address that provides reception desk and meeting room services, enabling users to operate from remote locations while having professional business addresses.

The term is 'telecommuting', which refers to working from a remote location utilizing technology.

I would recommend using a noise-canceling microphone or headphones to prevent background noise from disrupting meetings and ensure clear communication.

One alternative platform is Zoom, which is commonly used for video conferencing.

An example of a cloud storage service is Google Drive, which allows for easy saving and sharing of meeting records.

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

The app can provide interactive shopping experiences by overlaying 3D models of products in real-time, allowing customers to visualize items in their environment before making a purchase.

1. Camera: used to capture real-world images for augmented reality display.

2. GPS: provides location data to enhance the context of the augmented information.