Network

Question 1

What is a network ?

Answer 1

Multiple devices connected for the purpose of communication and sharing resources

Question 2

What is the order of the TCP/IP model ?

Answer 2

Application, transport, internet/network and link/data

Question 3

What are the protocols of application?

Answer 3

HTTP, HTTPS, FTP, IMAP and SMTP

Question 4

What are the protocols of transport ?

Answer 4

TCP and UDP

Question 5

What are the protocols of internet/network ?

Answer 5

IP

Question 6

What are the protocols of link/data ?

Answer 6

Ethernet

Question 7

What does TCP/IP stand for ?

Answer 7

Transmission Control Protocol/ internet protocol

Question 8

What does the application layer do ?

Answer 8

Where the software operates: web browsers, email services

Question 9

What does the transport layer do ?

Answer 9

Setting up the communication between 2 devices. Splitting data into packets and checking packets are correctly sent and delivered.

Question 10

What does the internet/network layer do ?

Answer 10

Adds IP addresses to data packets then directs them between devices using routers.

Question 11

What does the link/data layer do ?

Answer 11

Where the HARDWARE and drivers operate. Passes data over the PHYSICAL network, such as ethernet cable, WIFI signals, NICs etc.

Question 12

What is the internet ?

Answer 12

Allows computer networks around the world to talk to one another

Question 13

What is the World Wide Web (WWW) ?

Answer 13

n information system on the internet which allows documents to be connected to other documents by hypertext links

Question 14

What is a URL ?

Answer 14

The address of a web page

Question 15

Explain the purpose of a router?

Answer 15

A router receives and sends data on computer networks

Question 16

Explain the difference between an IP address and a MAC address ?

Answer 16

MAC address is used to ensure the physical address of a computer. It uniquely identifies the dives on a network. While IP address are used to uniquely identifies the connection of network with that device take part in a network

Question 17

What are the 5 topologies names ?

Answer 17

Ring, tree, mesh, star and bus

Question 18

What is two advantages of star ?

Answer 18

If a device fails its does not affects the other nodes and to add more devices simply by connecting them to the switch

Question 19

What is two disadvantages of star ?

Answer 19

The cost can be expensive because a wired star topology requires plenty of cables and the switch fails as no nodes can communicate if the whole network fails

Question 20

What is two advantages of bus ?

Answer 20

The cost can be cheap because often pay temporary network is needed that does not reply on very high data and they don’t have a lot of cables like star

Question 21

What is two disadvantages of bus ?

Answer 21

If the main cable breaks it wouldn’t work because the main cable connected everything and the more devices you add the less fast it will be

Question 22

What is a LAN ?

Answer 22

Local area network. It covers a small geographical area

Question 23

What is a WAN ?

Answer 23

Wide area network. It covers a large geographical area

Question 24

What is a PAN ?

Answer 24

Personal area network.

Question 25

What is a WAP ?

Answer 25

Wireless access point

Question 26

What is a NIC ?

Answer 26

Network interface card

Question 27

What is two advantage of wireless ?

Answer 27

Access easily and cheaper to set up

Question 28

What is two disadvantage of wireless ?

Answer 28

Speed usually slower and needs high security setting

Question 29

What is two advantage of wired ?

Answer 29

Very secure and higher speed

Question 30

What is two disadvantage of wired ?

Answer 30

Expensive equipment e.g hubs and trailing wires

Question 31

What is an example of a LAN ?

Answer 31

Office, schools, building

Question 32

What is an example of a WAN ?

Answer 32

The internet

Question 33

What is an example of PAN ?

Answer 33

Hotspot, video games

Question 34

What is an advantage of fibre optic cable ?

Answer 34

No loss of signal quality and high performance

Question 35

What is a disadvantage of fibre optic cable ?

Answer 35

Expensive

Question 36

What is an advantage of copper cable/ethernet ?

Answer 36

Cheaper than fibre and CAT 5e and CAT 6 have a decent bandwidth

Question 37

What is a disadvantage of copper cable/ethernet ?

Answer 37

Coaxial have a low bandwidth

Question 38

What is the connection method for PAN ?

Answer 38

Wi-Fi, Bluetooth and Ethernet

Question 39

What is the connection method of LAN ?

Answer 39

CAT 5e, CAT 6 and Ethernet

Question 40

What is the connection method for WAN ?

Answer 40

Fibre optic

Question 41

What is the advantages of connecting in a network ?

Answer 41

Sharing files is easier and communicate across a network easily

Question 42

What is the disadvantages of connecting in a network ?

Answer 42

Can be expensive to set up and networks can be vulnerable to hacking

Question 43

What does HTTP stand for and what does it do?

Answer 43

Hyper text transfer protocol and it is used for web browsers to access websites

Question 44

What does HTTPS stand for and what does it do ?

Answer 44

HTTPS secure it is used for a more secure version of HTTP

Question 45

What does FTP stand for and what does it do ?

Answer 45

File transfer protocol and it is used to access, edit and move file between devices on a network

Question 46

What is IMAP and what does it stand for

Answer 46

Used to retrieve emails form a server and it stands for internet message access protocol

Question 47

What does SMTP stand for and what does it do?

Answer 47

Used to send emails and transfer emails between servers

Question 48

What does TCP stand for and what does it do ?

Answer 48

Transmission Control Protocol and it communicates with the receiving device

Question 49

What does UDP stand for and what does it do?

Answer 49

User datagram protocol and it breaks down data into packets without numbering them

Question 50

What does IP stand for and what does it do ?

Answer 50

Internet protocol. Established connection between routers and handling network traffic

Question 51

list three different measures that can be used to maintain the security of a computer system

Answer 51

Encryption: - when files that are encrypted have been altered using a secret code and is unreadable to unauthorised parties - turns plain text into cipher text which protect data from being understood if it was hijacked MAC address: - Ensures that only authorised devices can connect to a network by reading the MAC addresses of the devices and letting only authorised devices entering - blocks out the possibility of hackers from hacked into the network anti-malware software: - types of software that prevent malware attacks - for example, anti-virus software is it has a database of known viruses and it warns the user if one of the viruses are on the system - also firewalls blocks and prevent network traffic based on a defined set of security rules. this prevents suspicious attachments like trojans entering

Question 52

what are two difference between LAN and WAN?

Answer 52

- Most WANs are made from several LANs connected together. | - LAN covers a small geographical area whereas WAN covers a large geographical area