EDEXCEL GCSE ICT: CONNECTIVITY

  • Created by: jordanb-h
  • Created on: 23-03-18 16:59
Most homes with a home network use it primarily to allow users to what?
share an internet connection
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To create a home network you need to set up what?
a local area network or LAN. This connects all the computers in the house so that resources can be shared
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State a benefit of a home network
sharing the Internet connection
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State a benefit of a home network
sharing files, including backing up files
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State a benefit of a home network
sharing peripherals, for example printers
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State a benefit of a home network
internet telephone services
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Connecting to the Internet from a home network requires what?
a router. The router connects all of the computers to the modem giving them an internal ip address so that it knows where to send the data
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State the disadvantage of setting up a cable connection to router using Ethernet cable or CAT5 cable
cables have to be run from the router to all rooms in the house
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State the disadvantage of the cost of a cable connection to router using Ethernet cable or CAT5 cable
installation is expensive
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State the advantage of Bandwidth using a cable connection to router using Ethernet cable or CAT5 cable
it is very fast. 1 Gigabit per second (Gbps) NICs are very cheap
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State the advantage of Security using a cable connection to router using Ethernet cable or CAT5 cable
good security: a user would need to physically plug their computer into the network with a cable
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State the advantage of Interference using a cable connection to router using Ethernet cable or CAT5 cable
should not experience interference
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State the disadvantage of Mobility using a cable connection to router using Ethernet cable or CAT5 cable
you cannot connect in a room without a socket. You have to unplug and reconnect if you want to move to a different room
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State the advantage of Mobility using a Wireless connection to router
you can access the network from anywhere in the house and you can stay connected moving from room to room
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What does a Powerline network use?
uses existing wiring as framework to carry data
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Wireless networks are what?
less secure than cable ones. If you do not secure your wireless network than anyone within range can access it
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State one way of securing a wireless network
change the default admin password on the router
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State one way of securing a wireless network
set up a form of encryption
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State one way of securing a wireless network
set up Media Access Control (MAC) address filtering
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State one way of securing a wireless network
hide the router by stopping the router broadcasting its Service Set Identifier (SSID)
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State one way of securing a wireless network
turn off the the router when it is not in use
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State one way of securing a wireless network
reduce the transmitting power
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What does encryption scramble?
data so that only computers with the right key can read it. The commonest form of protection for wireless networks is WEP, but WPA-PSK and WPA2 are more secure and becoming more popular
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In a network what does each device have?
a MAC address. You can specify which addresses can connect to your wireless network
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What is latency?
is the time in milliseconds between a bit leaving one device and arriving at the other. It is measured in milliseconds (ms)
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What is Bandwidth?
is the number of bits that can go through the network connection in 1 second. it is measured in bits per second
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Many devices are what?
converging: performing functions that were originally performed by different devices. If your mobile phone has a camera and an Internet connection, you could take and upload photos to a website using just that one device.
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What is a device called that can perform several functions?
a multifunctional device
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Using a network connection involves transferring what?
bits (1s and 0s) between two devices
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What is Network Performance?
is how well that network can transfer the bits. Bandwidth and latency are two measurements to describe the performance of a network connection
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For streaming videos from YouTube you need what?
a high bandwidth network connection otherwise the video will keep pausing as your computer waits for more bits to arrive
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To get quick results from Google you need what?
a low latency connection. Information is travelling in both directions so it needs to arrive quickly
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State an advantage of Wi-Fi
Good range- works up to 60 metres from the hotspot
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State an advantage of Wi-Fi
Speeds up to 54 mbps
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State a disadvantage of Wi-Fi
Hackers sometimes can set up fake Wi-Fi hotspots putting user's details at risk
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State a disadvantage of Wi-Fi
Cannot use if not in range of an access point
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What does mobile broadband allow devices to do?
connect to the Internet via the same network 3G mobile phones use. Many mobile phones have the technology to pick up 3G signals built in, whereas other devices need a dongle. A mobile phone with 3G capability can be made into a hotspot
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State an advantage of mobile broadband
far greater coverage than Wi-Fi
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State an advantage of mobile broadband
more secure than Wi-Fi - data is encrypted
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State a disadvantage of mobile broadband
have to pay for mobile broadband, including roaming charges if you are abroad
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State a disadvantage of mobile broadband
downloads limited
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State a disadvantage of mobile broadband
lower bandwidth than Wi-Fi
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What is a peer to peer network?
is when digital devices communicate wirelessly with each other directly without the need for a transmitter between them
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What is Wi-Fi direct?
this new technology allows devices to connect directly using Wi-Fi without the need for a wireless access point
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State an advantage of Wi-Fi direct
allows users to set up peer to peer networks
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State an advantage of Wi-Fi direct
allows devices to use an access point for normal Wi-Fi use
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What is another way of establishing a peer to peer network?
Bluetooth
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State an advantage of Bluetooth as a peer to peer network
allows devices to communicate automatically when within range- with no user involvement
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State an advantage of Bluetooth as a peer to peer network
can connect up to eight devices at the same time
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State an advantage of Bluetooth as a peer to peer network
low power so does not interfere with other devices
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State the bandwidth speed for Bluetooth 4
25 mbps
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State the bandwidth speed for Wi-Fi direct
250 mbps
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State the range for Bluetooth 4
60 metres
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State the range for Wi-Fi direct
200 metres
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What are protocols?
are the rules that devices must follow when they are communicating with each other
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What is Voice over Internet Protocol (VOIP)?
is the set of rules for transmitting audio messages over the internet. The rules enable you to make free voice calls from your computer to your friend's computers. It is particularly useful for keeping in touch when travelling or with someone who is
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VOIP: if you use a webcam as well then you can what?
make video calls
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State one device you can use VOIP from?
a smartphone
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What are POP3, IMAP and SMTP ?
communication protocols used when sending or receiving emails
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What takes an email from the server and delivers it to the recipient's computer?
POP
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What keeps an email on the server?
IMAP
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What is used when a email is sent from the sender's email client to the sender's email server and when the email is delivered to the recipient's email server?
Simple Mail Transfer Protocol (SMTP)
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If the recipient uses what to read a email, the mail server will download the email to the computer. The email is then deleted from the server and can be read offline?
Post Office Protocol (POP or POP3)
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If the recipient uses what, the email is read on the mail server. The email is not deleted from the server and can be accessed anywhere using any computer with an Internet connection
Internet Message Access Protocol (IMAP)
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What is Hypertext Transfer Protocol (HTTP)?
is the protocol of the World Wide Web (WWW)
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Other cards in this set

Card 2

Front

To create a home network you need to set up what?

Back

a local area network or LAN. This connects all the computers in the house so that resources can be shared

Card 3

Front

State a benefit of a home network

Back

Preview of the front of card 3

Card 4

Front

State a benefit of a home network

Back

Preview of the front of card 4

Card 5

Front

State a benefit of a home network

Back

Preview of the front of card 5
View more cards

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