Networks and Communications

Question 1

What is a modem

Answer 1

A device that sends and receives data over phone lines, cable, or satellite to connect your network to the Internet Service Provider (ISP).

Question 2

What is a firewall

Answer 2

A system that protects your network by controlling which data can come in or go out, based on security rules.

Question 3

What is a router

Answer 3

A device that sends data between different networks, like connecting your home network to the internet.

Question 4

What is a wired data transmission media

Answer 4

Wired data transmission media refers to the physical cables used to connect devices and transmit data in a network.

Question 5

What are the two types of wired data transmission media

Answer 5

1. Twisted pair cables
2. Fibre Optic cables

Question 6

What is a Twisted Pair

Answer 6

Twisted pair cables are made of copper wires twisted together to reduce interference from other wires and outside sources.

Question 7

What are the uses of a Twisted Pair cable

Answer 7

1.Widely used for telephone lines and local area networks (LANs).
2. Commonly used in networking standards such as Ethernet cables

Question 8

What are two advantages of the Twisted Pair cable

Answer 8

1.Cost-effective and easy to install.
2.Suitable for short to medium distances (up to 100 meters).

Question 9

What are two disadvantages of Twisted Pair cables

Answer 9

1. Susceptible to electromagnetic interference.
2. Has a limited amount of data capacity compared to fibre optic cables

Question 10

What is a Fibre Optic cable

Answer 10

Fiber optic cables use thin strands of glass or plastic fibers to transmit data as light signals.

Allowing data to travel at very high speeds over long distances.

Question 11

What is ISP

Answer 11

Stands for Internet Service Provider. A business that provides access to the internet for individuals and businesses

Question 12

What is Dial up

Answer 12

Dial-up is an older type of internet connection that uses a standard telephone line to connect to the internet. It works by dialing a phone number to reach the internet service provider (ISP)

Question 13

What are disadvantages of Dial Up

Answer 13

1.Offers much slower speeds compared to modern broadband connections.

2. Dial-up ties up the phone line while you’re online, so you can’t use the phone for calls at the same time.

Question 14

Advantages of Dial Up

Answer 14

Low cost

Question 15

What is satellite internet

Answer 15

Satellite internet connects you to the internet using satellites in space. It sends data between your satellite dish, a satellite in orbit, and a ground station.

Question 16

What is an advantages of Satellite Internet

Answer 16

useful for people in remote areas

Question 17

What is the disadvantages of Satellite Internet

Answer 17

Can be slower and affected by weather.

Question 18

What is an ADSL

Answer 18

ADSL (Asymmetric Digital Subscriber Line) is a type of internet connection that uses existing telephone lines to provide high-speed internet access

Question 19

Advantages of ADLS

Answer 19

Widespread Availability: Utilizes existing telephone lines, making it accessible in many areas.
Cost-Effective: Generally cheaper than fiber optic and cable internet options.

Question 20

Disadvantages of ADSL

Answer 20

Distance Limitation: Speed and performance can degrade the farther you are from the service provider’s central office.

Lower Speeds: Compared to fiber optic and some cable connections, ADSL speeds may be slower, particularly for heavy internet usage.

Question 21

What are the two types of Fibre Optic

Answer 21

Single-Mode Fiber (SMF): Uses one light path, ideal for long-distance communication with little signal loss.
Multi-Mode Fiber (MMF): Uses multiple light paths, best for shorter distances, up to 500 meters.

Question 22

What are the two types of Wireless Transmission

Answer 22

Radio Waves: Used for Wi-Fi, Bluetooth, and AM/FM radio. They have long wavelengths, can pass through walls, and are good for communication over short to medium distances.
Microwaves: Used in mobile phones and satellite communication. They have shorter wavelengths and need a direct line of sight between the transmitter and receiver.

Question 23

What are the two types of Wireless Transmission

Answer 23

Radio Waves: Used for Wi-Fi, Bluetooth, and AM/FM radio. They have long wavelengths, can pass through walls, and are good for communication over short to medium distances.
Microwaves: Used in mobile phones and satellite communication. They have shorter wavelengths and need a direct line of sight between the transmitter and receiver.

Question 24

What are the disadvantages of Wireless Transmission

Answer 24

○ Interference: Wireless signals can be affected by physical obstacles (like walls) and other electronic devices, leading to potential loss of signal quality.

	○ Security: Wireless networks can be more vulnerable to unauthorized access, requiring strong security measures like encryption.

Question 25

What is communication software

Answer 25

Communication software enables the exchange of information and data between individuals, systems, or devices.

Question 26

What are types of communication software

Answer 26

Browser and Email