1.3

Question 1

Internet

Answer 1

Largest most well known WAN
collection of interconnected networks spanning the world

Question 2

LAN and advantages

Answer 2

Local area network
Covers small geographical area
Used in homes, businesses, universities
Can update computers all at once
Can share hardware
Easier to share files

Question 3

WAN

Answer 3

Wide area network
Covers large geographical area
Contains hardware owned by a third party
The internet
Expensive - have to hire infrastructure
Connects LANs together

Question 4

Pros of networks

Answer 4

Allows communication, file transfer and sharing peripherals

Question 5

Cons of networks

Answer 5

Security risks
Hackers/data theft
Expensive

Question 6

Network

Answer 6

Group of electronic devices that are interconnected to exchange data and share resources

Question 7

What is network performance affected by

Answer 7

Bandwidth, latency, transmission media and error rate

Question 8

What are the two types of transmission media and examples

Answer 8

Wireless- Bluetooth, Wi-Fi
Wired- Ethernet, fibre optic

Question 9

Pros of client server

Answer 9

Central backup
Better security and maintenance
Easier to install/update software

Question 10

Cons of client server

Answer 10

More expensive - hardware costs and requires more technical skill
Central point of failure

Question 11

Pros of peer to peer

Answer 11

No central point of failure
Cheaper - no hardware costs and requires less technical skill so easier to maintain
Computers have same level of responsibility

Question 12

Cons of peer to peer

Answer 12

No central backup
Less security and maintenance

Question 13

Network interface card

Answer 13

Needed by every device to connect to a network

Question 14

Switch

Answer 14

Sends data packets within a LAN

Question 15

Router

Answer 15

Sends data packets between other networks

Question 16

Wireless access point

Answer 16

Allows device to connect without wires

Question 17

The cloud

Answer 17

Servers used to store data and programs to be accessed over the internet

Question 18

Cloud advantages

Answer 18

Accessibility- anywhere anytime
No hardware required as everything is hosted in the cloud
Hosts security/backup for you

Question 19

Protocol

Answer 19

Set of rules for how devices communicate and data is transmitted

Question 20

HTTP

Answer 20

Hyper text transfer protocol
Transferring web pages

Question 21

Https

Answer 21

Hyper text transfer protocol
Adding encryption to transferring web pages

Question 22

FTP

Answer 22

File transfer protocol
Transferring files

Question 23

Pop3

Answer 23

Post office protocol version 3
Receiving emails, original deleted from mail server

Question 24

IMAP

Answer 24

Internet message access protocol
Receiving emails, original kept on mail server

Question 25

SMTP

Answer 25

Simple mail transfer protocol Sending emails

Question 26

TCP

Answer 26

Sets rules for how devices connect to network Transmission Control Protocol

Question 27

Ip

Answer 27

Internet protocol Directs packets to destination

Question 28

Layers

Answer 28

Group of protocols with similar functions Each layer does work to activate the ones beside it 4) turns data into websites and other applications (HTTP,FTP,SMTP) 3) splits data into packets and checks it’s sent and delivered (TCP) 2) makes connections between networks and directs data (IP) 1) passes data over the physical network (Ethernet)

Question 29

Layers advantages

Answer 29

Breaks network communication into manageable layers Each layer can be changed without affecting the others

Question 30

Network topology

Answer 30

Arrangement of all the elements required to build a network

Question 31

Star topology

Answer 31

Wired with central switch to connect all devices Pros - if a single cable breaks only that computer is affected, simple to add devices Cons - switch is a single point of failure

Question 32

Full mesh topology

Answer 32

Every device connected to every other device Pros - if only one connection is broken it can be sent via a different route Cons - more cabling and switch hardware required which adds to cost

Question 33

Web server

Answer 33

Carry out many functions Most common ones are hosting websites and dealing with client requests

Question 34

Web server and DNS process

Answer 34

1) client requests a url via a web browser 2) browser sends DN to DNS (the dns translates the domain name into an ip address 3)DNS finds the ip address and returns it to the browser 4) user can send a request to the web server using the ip address to get information from websites

Question 35

What is bandwidth

Answer 35

Amount of data transferred at a given time

Question 36

Disadvantages of the cloud

Answer 36

Need internet connection Dependent on host for backup and security Expensive subscription fees