1.3 Flashcards

1
Q

Network Interface Controller (NIC)

A

Allows devices to connect to a network

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2
Q

Switch

A

Receives and transmits data between devices on a LAN using MAC addresses

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3
Q

Transmission media

A

Wires or wireless radio waves that allows data transmission between devices

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4
Q

Wireless access point (WAP)

A

Allows devices to connect to a network wirelessly

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5
Q

Router

A

Transmits data between networks by directing data as packets to their destination

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6
Q

Wired networks

A

Three cables to connect devices on an Ethernet (wired) network

  • twisted pair
  • coaxial cable
  • fibre optic
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7
Q

Twisted pair

A

Copper wires twisted together in pairs to reduce an internal interference

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8
Q

Coaxial cable

A

Single copper wire surrounded by plastic insulation and mesh to shield outside interference

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9
Q

Fibre optic

A

Transmits data as light, can be over long distances with little interference
High speed but expensive

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10
Q

Wireless networks

A

Radio waves transmit data between devices on wireless networks

  • Bluetooth
  • WiFi
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11
Q

Bluetooth

A

Direct connection between two devices to share data
- low bandwidth (10 metres)

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12
Q

WiFi

A

Can connect multiple devices to a LAN at once
- high bandwidth (40-100 metres)

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13
Q

Wired vs wireless

A

Wired - tend to be faster and more reliable than wireless

Wireless - tend to be cheaper and more convenient than wired

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14
Q

Client-server networks

A

Files, passwords, software are all stored centrally on the server

  • easy file tracking
  • reliable
  • back up files and software easily
  • expensive
  • if the server goes down, clients lose access
  • can be overloaded
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15
Q

Peer-to-peer networks

A

Devices connect directly - no server, files are stored on individual devices and shared with others

  • easy to maintain without expertise
  • no dependence
  • updates and backups are complex
  • hard to track files
  • data can be lost if failure
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16
Q

Star topology

A
  • all devices connect to a central network or server that controls the network
  • network is unaffected if the device fails
  • high performance
  • easy to add more devices
  • expensive
  • switch is a single point of failure
17
Q

Mesh topology

A

No switch - data sent along fastest route from one device to another

  • no single point of failure
  • add devices without affecting performance
  • expensive
  • hard to maintain lots of connections