Topic 4: Networks

Question 1

Standalone computer

Answer 1

A computer that is not connected to a network

Question 2

Network

Answer 2

An arrangement of two or more computers that are connected together for the purpose of sharing resources and data

Question 3

Internet of Things (loT)

Answer 3

A network of physical objects that use sensors, actuators, embedded systems and wireless technology such as WiFi and bluetooth to collect and exchange data with no human interacion

Question 4

VoIP

Answer 4

Voice internet protocol

Question 5

LAN

Answer 5

Local Area Network
- School network

Question 6

WAN

Answer 6

Wide Area Network
-Bank / hotel chain network

Question 7

WLAN

Answer 7

Wireless Local Area Netwrok
- Hand held scanners

Question 8

Server

Answer 8

A computer connceted to a network used to coordinate (store and share) huge amounts of data

Question 9

Latency

Answer 9

The time it takes for a message to transfer (ms). AkA ping

Question 10

Internet

Answer 10

• An interconnected network or network of networks.
• Most networks are part of the internet.
• Consists of multiple cables or links that connect countries together, and can be though of as the backbone.

Question 11

Packet switching

Answer 11

• Breaking down a large amount of data into small packets, each packet is independent from one another
• Each packet is tagged with:
  • Source address
  • Destination address
  • Sequence number of the packet
  • total number of packets being sent

Question 12

Router

Answer 12

Manages communication on the network. Can have a built-in wireless access point (WAP)

Question 13

TCP

Answer 13

• Transmission Control Protocol
• Responsible for delivering data to a given address

Question 14

Modem

Answer 14

Modulator / Demodulator

Question 15

HTTP

Answer 15

Hyper Text Transfer Protocol

Question 16

SMTP

Answer 16

Simple Mail Transfer Protocol

Question 17

Network topology

Answer 17

A Network topology is the arrangement with which computer systems or network deveices are connected to each other

Question 18

Bus topology

Answer 18

In a bus topology, all nodes in the network are connected directly to a central cable that runs up and down the network

Question 19

Ring topology

Answer 19

Each node is connected with two other deveices

Question 20

Star typology

Answer 20

All nodes indirectly connect to each other through 1 or more switches. The switch acts as a central point through which all communications are passed.

Question 21

Mesh topology

Answer 21

There is no central connection point. Instead each node is connected to at least one other node

Question 22

Avantages of bus topology

Answer 22

• Easy to install
  -Cheap to install

Question 23

Disadvantages of bus topology

Answer 23

-If the central cable fails the whole networks fails and stops working

Question 24

Advantages of Ring topology

Answer 24

• No data collisions, as the data only flows in one directions

Question 25

Disadvantages of ring topology

Answer 25

If the main cable fails, the network fails

Question 26

Advantages of star topolgy

Answer 26

- If a cable fails, the whole network will not fail and other computers can still work - High performance as there are no data collisions

Question 27

Disadvantages of star topology

Answer 27

- It is expensive to build as it requires more hardware such as switches and wires

Question 28

Advantages of mesh topology

Answer 28

- Manages a large amount of data as computers can trasnmit data simultaneously - If a cable fails, the network still works

Question 29

Disadvantages of mesh topology

Answer 29

-It is expensive to build - It requires much more time to repair or build

Question 30

IP

Answer 30

- Internet protocol - Responsible for obtaining the address to which data is sent. - A set of rules that govern data transfer in the internet

Question 31

TCP/IP

Answer 31

- Layered protocol stack - Collection of protocols - It sets how data should be formatted and transmitted across networks

Question 32

Web Server

Answer 32

Holds and shares web pages

Question 33

File server

Answer 33

Holds and maintains user files

Question 34

Mail server

Answer 34

Handles emails between users

Question 35

Network speed

Answer 35

File size / time