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GCSE Computer Science > 1.4- Networks > Flashcards

1.4- Networks Flashcards

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1
Q

What is a LAN?

A

Local area network

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2
Q

what is a WAN?

A

Wide area network

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3
Q

Describe what a LAN is.

A

A LAN is

  • a local area network
  • it connects computers and other devices in a small area
  • most LANs connect workstations and personal computers to access data
  • eg. Printers
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4
Q

Describe a WAN

A

A WAN is

  • a computer network that spans a relatively large area
  • typically in WANs they consist of two or more local-area networks.
  • computers connected to a wide area network are often connected through public networks.
  • eg. the telephone system
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5
Q

Advantages of networks

A
  • sharing devises such as printers
  • software licences are likely to be cheaper
  • security is good
  • files can be shared
  • data is easy to backup
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6
Q

Disadvantages of networks

A
  • purchasing networks cabling and file servers can be expensive
  • managing a large network is complicated.
  • if the file server breaks down the files on the server becomes inaccessible
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7
Q

Factors that affect the performance of network

A
  • Number of users
  • error rate
  • transmission media
  • bandwidth
  • latency
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8
Q

Why does number of users affect the performance of networks

A

Internet speeds slow down will occur when a large number of people try to connect to the internet at the same time

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9
Q

Why does error rate affect the performance of networks

A

The number of corrupted bits expressed as a percentage or fraction of the total sent

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10
Q

Why does transmission media affect the performance of networks

A

Integrated cabling design, selection of router, correct cabling operations

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11
Q

Why does bandwidth affect the performance of networks

A

Bandwidth is the amount of data that could potentially be transferred by that network in a given period of time.

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12
Q

Why does latency affect the performance of networks

A

The large bandwidth-delay product of high latency connections

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13
Q

Whats the advantages of a Client-Server network

A
  • Easier to take backups of all shared data
  • Easier to install software updates
  • Easier to manage security of files
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14
Q

Whats the disadvantages of a Client-Server Network

A
  • Requires IT specialists
  • Can be expensive to set up and maintain
  • A single point of failure. Users will lose access if the server fails.
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15
Q

Advantages of Peer-To-Peer networks

A
  • Very easy to maintain. Specialists staff are not required
  • Cheaper to set up.
  • No dependancy on a single machine
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16
Q

Disadvantages of a Client-Server network

A

V-Requires IT specialists to maintain

  • Can be expensive to set up and maintain
  • A single point of failure. If the server fails users will loose access
17
Q

Disadvantages of Peer-To-Peer networks

A
  • users will need to manage their own backups.
  • the network is less secure
  • can be difficult to maintain a well ordered file store.
18
Q

Definition of a internet

A

A global computer network, providing a verity of information and communication facilities.

19
Q

What is a VLAN

A

virtual LAN

20
Q

What is the definition of WIFI

A

a facility allowing computers, smartphones, or other devices to connect to the Internet or communicate with one another wirelessly within a particular area.

21
Q

What is a Switch?

A

A network switch is a computer networking device that connects devices together on a computer network by using packet switching to receive, process, and forward data to the destination device.

22
Q

What is a router?

A

Connects devices together

23
Q

What is an Ethernet cable?

A

An Ethernet cable is one of the most popular forms of network cable used on wired networks. Ethernet cables connect devices together within a local area network, like PCs, routers, and switches.

24
Q

Mobile broadband

A

Mobile broadband is the marketing term for wireless Internet access through a portable modem, USB wireless modem, tablet/smartphone or other mobile device.

25
Q

Personal area network

A

A personal area network (PAN) is a computer network used for data transmission amongst devices such as computers, telephones, tablets and personal digital assistants.

GCSE Computer Science (1 decks)

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