topic 2

Question 1

What is a computer network?

Answer 1

A set of computers connected together for the purpose of sharing resources.

Question 2

What is the most common resource shared in a computer network?

Answer 2

Connection to the Internet.

Question 3

Name two other shared resources in a computer network.

Answer 3

• Printer
• File server

Question 4

How can computers be connected in a network?

Answer 4

Via cabling or wirelessly.

Question 5

What is the most common type of cabling used?

Answer 5

Ethernet cable.

Question 6

What are the two types of computers in a network?

Answer 6

• Clients
• Servers

Question 7

What is the role of a client in a network?

Answer 7

To request information from a server.

Question 8

What is the role of a server in a network?

Answer 8

To provide and manage information for clients.

Question 9

What are the two widely used networking models?

Answer 9

• Client-server
• Peer-to-peer (P2P)

Question 10

Describe the client-server model.

Answer 10

A relationship where one computer (the client) requests a service from another (the server).

Question 11

What is an example of the client-server model?

Answer 11

Web browsers requesting websites from web servers.

Question 12

True or False: In a client-server model, clients are dependent on servers.

Answer 12

True.

Question 13

Fill in the blank: Computers that provide information are called _______.

Answer 13

servers.

Question 14

what is a network model

Answer 14

a framework that allows devices to communicate with each other, either wirelessly or wired

Question 15

what is p2p

Answer 15

where each connected device acts as both a client and a server, all having equal responsibility for providing resources

Question 16

what is adhoc network

Answer 16

a temporary network where devices communicate without a centralized infrastructure

Question 17

what is tethering

Answer 17

the linking of a device to a smartphone in order to connect to the internet

Question 18

what is hotspot

Answer 18

the physical location where people can access the internet

Question 19

what is a network communication protocol

Answer 19

it defines the rules and standards for devices to communicate with each other over wired or wireless networks

Question 20

what is wifi

Answer 20

Wi-Fi is a wireless networking technology that allows devices to connect to the internet and local networks without cables.
✔ Wireless connectivity for internet access and local networks.
✔ Allows multiple devices to connect simultaneously.

Question 21

what is zigbee

Answer 21

ZigBee is a wireless protocol that allows low-power devices to communicate with each other.
✔ Low power consumption, ideal for battery-operated devices.
✔ Limited data transfer rate (up to 250 kbps).
✔ Used for low-bandwidth application

Question 22

what is bluetooth

Answer 22

wireless communication protocol used for connecting devices directly to each other, without internet access.
✔ Short-range
✔ Low power consumption
✔ Secure pairing with encryption

Question 23

what is the global system for mobile communications (cellular - 3G, 4G, 5G)

Answer 23

a standard for cellular communication that enables mobile voice calls, text messaging, and mobile internet access.
✔ Wide coverage
✔ Supports mobile calls, SMS, and mobile internet.
✔ Uses SIM cards for network authentication.

Question 24

what is infared

Answer 24

Infrared is a short-range communication technology used for data transfer between close-range devices.

Question 25

what is ethernet

Answer 25

Ethernet is a wired networking protocol that allows devices to communicate. ✔ Wired connection ✔ High-speed data transfer ✔ Low latency, reliable and secure communication. ✔ Requires network switches or routers for multiple devices.

Question 26

describe why the network metric SPEED is important in assessing the performance

Answer 26

the rate at which data is transmitted over a network. ✔ Determines how fast data can be uploaded or downloaded. ✔ Affects the performance of online applications like streaming, gaming, and cloud services.

Question 27

describe why the network metric BANDWIDTH is important in assessing the performance

Answer 27

amount of data that can be transmitted over a network. ✔ Higher bandwidth allows more data to be transferred simultaneously.

Question 28

describe why the network metric THROUGPUT is important in assessing the performance

Answer 28

how much data can be transferred over a network in a given time.

Question 29

describe why the network metric SCALABILITY is important in assessing the performance

Answer 29

how well a network can expand to handle increased traffic without performance loss. ✔ Essential for business growth, cloud computing, and large-scale systems. ✔ Networks with good scalability can add more devices without slowdown.

Question 30

describe why the network metric LATENCY is important in assessing the performance

Answer 30

the time delay for the data to get to its destination ✔ High latency causes lag. ✔ Lower latency is essential.

Question 31

what are the 9 network metrics

Answer 31

speed (internet) latency error rate jitter bandwidth throughput scalability packet loss network availability

Question 32

describe why the network metric ERROR RATE is important in assessing the performance

Answer 32

This measures the number of errors that occur during data transmission

Question 33

describe why the network metric PACKET LOSS is important in assessing the performance

Answer 33

Packet loss happens when data packets fail to reach their destination. It can cause freezing in video calls or missing content in downloads.

Question 34

what are the characteristics and functions of IPV4 adresses?

Answer 34

Format: numeric dot decimal notation(e.g., 192.168.1.1) Made up of 32 bits Still widely used, but running out of addresses.

Question 35

what are the characteristics and functions of IPV6 adresses?

Answer 35

Format: hexadecimal notation (e.g., 2001:0db8:85a3:0000:0000:8a2e:0370:7334) Made up of 128 bits, allowing for trillions of addresses. Designed to replace IPv4 due to address shortage.

Question 36

what are the characteristics and functions of STATIC ADRESSES?

Answer 36

Manually assigned and does not change. Often used for servers, printers, or devices that need a consistent address. Easier to manage in small networks but less flexible.

Question 37

what are the characteristics and functions of DYNAMIC ADRESSES?

Answer 37

Automatically assigned by a server (usually using DHCP). Changes from time to time. Better for general users and larger networks because it's easier to manage.

Question 38

what are the features and characteristics of DYNAMIC HOST CONFIGURATION PROTOCOL (DHCP)

Answer 38

Dynamic Host Configuration Protocol (DHCP) A network service that automatically assigns IP addresses to devices. Reduces the need for manual setup. Ensures no two devices get the same IP address at the same time.