Your school is launching a major drive to embrace the digital era - NSC Information Technology - Question 6 - 2017 - Paper 2

Biometrics refers to the use of personal characteristics of individuals, such as fingerprints or facial recognition, to authenticate their identity.

A suitable example of biometrics that can be used is fingerprint recognition.

Two disadvantages of using RFID cards are:

• Cards can be lost or stolen, leading to potential unauthorized access.
• Cards can be cloned, which poses a security risk.

Virtual memory is a feature of an operating system that uses hard drive space to extend the available RAM, allowing more applications to run simultaneously.

The operating system (OS) implements and manages virtual memory in a computer system.

The use of virtual memory can be limited by:

• Adding more RAM to the system.
• Closing applications that are not in use.

Lossless compression ensures that no data is lost during the compression process, allowing the original file to be perfectly reconstructed. In contrast, lossy compression sacrifices some data and quality for a smaller file size, meaning the original file cannot be fully restored.

A protocol is a set of rules defining how data is transmitted across a network, including encoding and decoding techniques for data transmission.

The SMT protocol is used for sending emails over the Internet.

A distributed database is a type of database that is spread across multiple servers in different geographic locations, allowing data to be processed and accessed more efficiently.

Two advantages include:

• It can handle a larger number of simultaneous users.
• It helps reduce congestion as data can be accessed locally.

The main feature of Web 1.0 is that it primarily consists of static web pages where content is mostly read-only, allowing little to no user interaction.

Web 3.0 is referred to as the Semantic Web because it aims to enhance the ability to interpret information in a way that allows better understanding and usability, enabling humans and machines to communicate more effectively.

This feature is called the 'Internet of Things' (IoT).

A webinar is an online seminar or presentation that is conducted over the Internet.

One way the staff member may benefit is by expanding their knowledge base on education techniques.

SaaS stands for 'Software as a Service.'

Cloud applications work by processing data and storing files on remote servers in the cloud instead of on local devices. Users access these applications through a web browser, allowing for flexibility and accessibility from various devices.

Two disadvantages include:

• Dependency on an Internet connection; if the service is down, access is lost.
• Security concerns regarding data privacy and storage.

An RSS service is a web-based feed that automatically provides users with updated content, allowing them to stay informed without having to regularly check the source.

Two ways to use social networking sites responsibly include:

• Limiting time spent online and ensuring that social media use does not interfere with important work.
• Being cautious about sharing personal information.

Two reasons include:

• The relative anonymity of the Internet makes it difficult to trace criminals.
• General disregard for online safety among users leads to increased vulnerabilities.

The term used to describe this crime is 'piggybacking.'

A drone is a machine that has certain autonomous flight capabilities but is still controlled by a human.

Two benefits of using a 3D printer include:

• The ability to create parts quickly and with precision.
• Reducing costs compared to traditional manufacturing methods.