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Computing > Network > Flashcards

Network Flashcards

1
Q

What is a network ?

A

Multiple devices connected for the purpose of communication and sharing resources

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2
Q

What is the order of the TCP/IP model ?

A

Application, transport, internet/network and link/data

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3
Q

What are the protocols of application?

A

HTTP, HTTPS, FTP, IMAP and SMTP

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4
Q

What are the protocols of transport ?

A

TCP and UDP

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5
Q

What are the protocols of internet/network ?

A

IP

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6
Q

What are the protocols of link/data ?

A

Ethernet

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7
Q

What does TCP/IP stand for ?

A

Transmission Control Protocol/ internet protocol

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8
Q

What does the application layer do ?

A

Where the software operates: web browsers, email services

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9
Q

What does the transport layer do ?

A

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

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10
Q

What does the internet/network layer do ?

A

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

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11
Q

What does the link/data layer do ?

A

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

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12
Q

What is the internet ?

A

Allows computer networks around the world to talk to one another

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13
Q

What is the World Wide Web (WWW) ?

A

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

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14
Q

What is a URL ?

A

The address of a web page

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15
Q

Explain the purpose of a router?

A

A router receives and sends data on computer networks

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16
Q

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

A

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

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17
Q

What are the 5 topologies names ?

A

Ring, tree, mesh, star and bus

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18
Q

What is two advantages of star ?

A

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

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19
Q

What is two disadvantages of star ?

A

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

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20
Q

What is two advantages of bus ?

A

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

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21
Q

What is two disadvantages of bus ?

A

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

22
Q

What is a LAN ?

A

Local area network. It covers a small geographical area

23
Q

What is a WAN ?

A

Wide area network. It covers a large geographical area

24
Q

What is a PAN ?

A

Personal area network.

25
Q

What is a WAP ?

A

Wireless access point

26
Q

What is a NIC ?

A

Network interface card

27
Q

What is two advantage of wireless ?

A

Access easily and cheaper to set up

28
Q

What is two disadvantage of wireless ?

A

Speed usually slower and needs high security setting

29
Q

What is two advantage of wired ?

A

Very secure and higher speed

30
Q

What is two disadvantage of wired ?

A

Expensive equipment e.g hubs and trailing wires

31
Q

What is an example of a LAN ?

A

Office, schools, building

32
Q

What is an example of a WAN ?

A

The internet

33
Q

What is an example of PAN ?

A

Hotspot, video games

34
Q

What is an advantage of fibre optic cable ?

A

No loss of signal quality and high performance

35
Q

What is a disadvantage of fibre optic cable ?

A

Expensive

36
Q

What is an advantage of copper cable/ethernet ?

A

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

37
Q

What is a disadvantage of copper cable/ethernet ?

A

Coaxial have a low bandwidth

38
Q

What is the connection method for PAN ?

A

Wi-Fi, Bluetooth and Ethernet

39
Q

What is the connection method of LAN ?

A

CAT 5e, CAT 6 and Ethernet

40
Q

What is the connection method for WAN ?

A

Fibre optic

41
Q

What is the advantages of connecting in a network ?

A

Sharing files is easier and communicate across a network easily

42
Q

What is the disadvantages of connecting in a network ?

A

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

43
Q

What does HTTP stand for and what does it do?

A

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

44
Q

What does HTTPS stand for and what does it do ?

A

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

45
Q

What does FTP stand for and what does it do ?

A

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

46
Q

What is IMAP and what does it stand for

A

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

47
Q

What does SMTP stand for and what does it do?

A

Used to send emails and transfer emails between servers

48
Q

What does TCP stand for and what does it do ?

A

Transmission Control Protocol and it communicates with the receiving device

49
Q

What does UDP stand for and what does it do?

A

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

50
Q

What does IP stand for and what does it do ?

A

Internet protocol. Established connection between routers and handling network traffic

51
Q

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

A

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
52
Q

what are two difference between LAN and WAN?

A
  • Most WANs are made from several LANs connected together.

- LAN covers a small geographical area whereas WAN covers a large geographical area

Computing (4 decks)

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