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Computer Science OCR GCSE > 1.3 Networks Final > Flashcards

1.3 Networks Final Flashcards

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1
Q

What is a WAN?

A

A WAN connects two or more networks located over a large geographical area.

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2
Q

How many LANs do you need to make a WAN?

A

2 or more.

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3
Q

What is an IP address?

A

The address of the device on a network.

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4
Q

What does a router do?

A

It sends data out of the network.

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5
Q

What is a Packet?

A

A chunk of information with an IP address.

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6
Q

What does PAN stand for?

A

Personal Area Network.

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7
Q

What is a LAN?

A

A LAN is a network of devices located in a small geographical area, i.e., small office building or a family home.

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8
Q

What is the top speed of a coaxial cable?

A

10mbps per second.

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9
Q

What is another name for a twisted pair cable?

A

Ethernet cable.

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10
Q

Is fibre optic cable expensive?

A

it is the most expensive we have been taught about

perchance

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11
Q

Are fibre optics used in long distances or short distances?

A

Long distances.

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12
Q

What are fibre optic cables made of?

A

Glass core - or in cheaper lower grade ones, plastic.

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13
Q

What is the average maximum speed of a fibre optic cable?

A

10 gigabits (10000 megabits).

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14
Q

What is a router?

A

Connects together different networks and forwards data packets along a network.

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15
Q

What is the best cable for short distances?

A

Ethernet.

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16
Q

How fast can coaxial cables transfer data?

A

10 mbps - 100mbps.

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17
Q

How fast are fibre optic cables?

A

10 gigabytes.

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18
Q

How many megabytes are in a gigabyte?

A

1000.

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19
Q

What is latency?

A

How much lag/delay there is.

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20
Q

What does a switch do?

A

Sends data between devices in the network.

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21
Q

What is external hosting?

A

When a site is run on a server managed and owned by another company, for storage.

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22
Q

What is bandwidth?

A

The number of users that can use the network.

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23
Q

What is an advantage of a peer-to-peer network?

A

Easier to set up and manage than a client-server.

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24
Q

What is an advantage of local hosting?

A

You have more control over it.

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25
Q

Which network (client or peer-to-peer) is cheaper?

A

Peer to peer.

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26
Q

Does a peer-to-peer network have a server?

A

No.

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27
Q

What is an advantage of a client-server network?

A

Private.

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28
Q

Which network topology has a central hub?

A

Star.

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29
Q

What are some disadvantages of a peer-to-peer network?

A
  • No centralized storage.
  • Each computer has to be individually set up.
  • No central user authentication or access rights.
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30
Q

Name one advantage of a star network topology.

A

It is easy to add new nodes.

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31
Q

What is the main role of the switch?

A

Connects devices on a LAN together.

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32
Q

What is the function of a TCP/IP?

A

It is used when we are sending and receiving data over a network.

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33
Q

Why is a star network called a star network?

A

It’s shaped like a star.

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34
Q

What is the function of a POP?

A

Used to send and receive emails and can only handle one letterbox.

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35
Q

What is topology?

A

The layout of a network.

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36
Q

What are the differences between IPv4, IPv6, and MAC?

A

IPv4 = 32 Bits, IPv6 = 128 Bits, MAC = Hexadecimal.

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37
Q

What is the center of a star topology?

A

A switch.

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38
Q

What is a flaw of star topology?

A

If the switch fails then all the devices connected will have no network connection.

39
Q

What does TCP stand for?

A

Transmission Control Protocol.

40
Q

What does POP stand for?

A

Post Office Protocol.

41
Q

What does HTTP/S stand for?

A

Hypertext Transfer Protocol Secure.

42
Q

List two different network topologies and an advantage for each.

A

Star can add nodes easily; Mesh, if one node fails the network still functions.

43
Q

What is a disadvantage of a mesh network?

A

The complexity increases as the size of the network increases.

44
Q

What does SMTP stand for?

A

Simple Mail Transfer Protocol.

45
Q

What is external hosting?

A

External hosting is if you pay someone to host your server.

46
Q

What does IMAP stand for?

A

Internet Message Access Protocol.

47
Q

Why is fibre optic good?

A

It is very fast.

48
Q

What is the purpose of a variable?

A

It holds one or more values.

49
Q

What is a disadvantage of a star network topology?

A

If the central hub fails then the whole network will go down.

50
Q

What is the function of a SMTP?

A

Sends and receives emails, push emails from one server to another.

51
Q

What does FTP stand for?

A

File Transfer Protocol.

52
Q

What is an advantage of a mesh network?

A

It is a reliable and robust network because if one node goes down, all the rest can carry on.

53
Q

What does ISP stand for?

A

Internet Service Provider.

54
Q

What are the differences between a static and dynamic IP?

A

Static = IP Does Not Change; Dynamic = Changes IP.

55
Q

What is TCP/IP?

A

Transmission Control Protocol / Internet Protocol.

56
Q

What is an advantage of a star network?

A

Add nodes easily because you only need one connection.

57
Q

What are the 4 layers?

A

Application, Link, Transport, Network.

58
Q

What are network protocols?

A

A set of rules for how devices communicate over a network.

59
Q

What is a node?

A

A device.

60
Q

What is the function of a FTP?

A

Where you transfer files between client and server.

61
Q

What are fibre optic cables made out of?

A

Glass.

62
Q

What is a LAN?

A

Local Area Network.

63
Q

Why are fibre-optic cables made of glass?

A

So light can travel through the wire easily.

64
Q

What is latency?

A

How much time it takes for a packet to travel across the network.

65
Q

What is POP used for?

A

Receive emails from one remote server, only handle one mailbox.

66
Q

How fast is a fibre optic cable?

A

10000mbps.

67
Q

Why are fiber optic cables so fast?

A

Because they are made of light, and can travel at the speed of light.

68
Q

What is a WAN?

A

Wide Area Network.

69
Q

What is iteration?

A

Iteration is the repetition of a process.

70
Q

What is an advantage of local hosting?

A

Easy to access.

71
Q

What does an IPv4 address look like?

A

Dotted quad or dotted decimal.

72
Q

How many bits is an IPv4 address?

A

32 bits, 4 bytes.

73
Q

What does an IPv6 address look like?

A

A set of 16-bit hexadecimals separated by colons.

74
Q

How many bits is an IPv6 address?

A

128 bits, 16 bytes.

75
Q

What does a MAC address look like?

A

00-B0-D0-63-C2-26.

76
Q

How many bits is a MAC address?

A

48 bits, 6 bytes.

77
Q

What is the first step when resolving a domain with a DNS?

A

requesting website information

78
Q
A
79
Q

Why do we use network layers?

A

handles the routing and sending of data between different networks

80
Q

What is a NIC?

A

Network Interface Card.

81
Q

What does IP stand for?

A

Internet Protocol.

82
Q

What does HTTP/S stand for?

A

HyperText Transfer Protocol / Secure.

83
Q

What is the main function of a switch?

A

To connect devices together.

84
Q

What is transmission media?

A

It is the way you choose to send your data.

85
Q

What is bandwidth?

A

How much data can pass each other.

86
Q

What is a link layer?

A

The link layer is the lowest layer. This is where packets physically get passed from one device to another, using MAC addresses.

87
Q

What is an advantage of client servers?

A
88
Q

What is a disadvantage of client servers?

A

Needs specialists to set up (additional costs).

89
Q

What is an example of IPv4?

A

192.168.0.254 (32 bytes).

90
Q

What is an example of IPv6?

A

2001:db8:3333:4444:CCCC:DDDD:EEEE:FFFF (128 bytes).

91
Q

What is the purpose of TCP?

A

Used to send data and receive data over a network.

92
Q

What is HTTP?

A

Set of rules used for sending and receiving web pages.

93
Q

What is asymmetric encryption?

A

The public key is used to encrypt messages, but it can’t be used to decrypt them. So it’s safe to send across the internet to anyone. To decrypt a message encoded with the public key, you need to have the second, private key. This is never sent across a network, so it remains secret and safe.

Computer Science OCR GCSE (2 decks)

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