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Computing GCSE > 1.4 Wired and Wireless Networks > Flashcards

1.4 Wired and Wireless Networks Flashcards

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1
Q

local area network definition

A
  • covers small geographic area
  • hardware owned by organisation using it
  • either wired or wireless using wifi
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2
Q

wide area network definition

A
  • covers large area , connecting lans
  • infrastructure between lans is leased from telecommunications companies
  • are connected with telephone lines, fibre or satellite
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3
Q

advantages of networks

A
  • users can share files
  • users scan share peripherals
  • users can access their files from any computer
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4
Q

disadvantages of networks

A
  • security risk
  • malware and viruses spread easily
  • server fails , computer may not work
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5
Q

network performance effects

A 
number of users
error rate
transmission rate
bandwidth 
latency
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6
Q

number of users

A

more users the more bandwidth used so could cause network slowdown

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7
Q

error rate

A

less reliable connections increase errors , data has to be resent till it’s sent correctly , quality dependant on range and quality

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8
Q

transmission media

A

wired connections have higher bandwidth than wireless, fibre optic is better than copper

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9
Q

bandwidth

A

amount of data that can be sent and received successfully in a given time. the amount of data that can be send on the transmission media. Fibre optic better than copper

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10
Q

latency

A

the delay from transmitting data to recovering it. caused by bottlenecks in the infrastructure of the network. ex not using switches to segment traffic

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11
Q

client server

A
  • server controls access and security to one shared file store
  • manages access to the internet
  • manages printing jobs
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12
Q

peer to peer

A
  • peer is a singular computer on the network
  • each is responsible for its security
  • each is responsible for its own backup
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13
Q

advantages of client server

A
  • easier to manage security
  • easier to install software updates
  • easier to take backups of data
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14
Q

advantages of peer to peer model

A
  • very easy to maintain
  • no dependency on a singular machine
  • cheaper to set up , no expensive hardware
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15
Q

disadvantages of client server

A
  • can be expensive to set up and maintain
  • single point of failure, lose access of the server fails
  • requires it specialists to maintain
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16
Q

peer to peer model disadvantages

A
  • users will need to manage their own backups
  • can be difficult to maintain a well ordered file store
  • network is less secure
17
Q

vlan advantages

A
  • very scaleable
  • quite secure , users can’t access other computers even if there on the same switch
  • cheaper as you don’t need frequent upgrades to the network infrastructure
18
Q

personal area network

A

usually based of Bluetooth connections between devices like keyboard and headphones , cover short distances but very portable

19
Q

wireless access point definition

A

enables other devices to connect to a wireless network and communicate with one another

20
Q

router definition

A

device that transfers data from one network to another, is needed to connect to a wan, uses an ip adress on a device to route traffic to other routers

21
Q

switch defenition

A

sends data between computers on a lan , uses the nic address to route traffic

22
Q

network interface card defenition

A

connects a device to a wired or wireless network connection, uses protocol to ensure successful connection

23
Q

wireless network connection (points)

A
  • no cables
  • portable connection
  • bandwidth is lower
  • security is a problem
24
Q

wired network (points)

A
  • connection between desktops with a switch, made with copper cable
  • cheap and flexible so easier to install
25
Q

fibre optic (why)

A

used for longer distances, higher bandwidth than copper and less interference

26
Q

domain name service defenition

A

internet service that translate me domain name into an IP address

27
Q

hosting service definition

A

provided to customers where a company provides storage on the company sever for the customer website

28
Q

cloud definition

A

service that provides access to remote servers that store data and software that can be accessed on the internet

29
Q

MAC address

A

unique identifier similar to a serial number assigned to networking equipment at time of production

30
Q

IP address

A

unique number identifying any computer network on the internet

31
Q

URL

A

a location or address identifying where documents can be found on the internet

Computing GCSE (3 decks)

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