Networks Flashcards
What are the disadvantages of a tablet? (two)
Depend on Wi-fi to connect to the Internet (Wi-fi is less reliable and less secure than a wired connection)
Small screens may means content may not display as well as on a laptop or a desktop PC
Authentification
What does this describe?
Used with emails to check they are authentic
This means they are checked to make sure they came from the person they appear to be from
Digital signatures
What are the features o an IP address?
All computers and devices connected to the Internet are allocated a unique number called an IP address
The IP address determines its exact location
Computers on the same network have the same first few numbers
Computers on the same network are uniquely identified by the last few numbers of their IP addresses
What is VoIP an example of?
A communication method over a network
What are these? Hardware Software Data An Internet connection
Shared resources on a network
What are five features of a LAN?
Confined to a small area Usually located in a single building Use cable, wireless, infrared and microwave links that are usually owned by the organization Cheap to build Cheap to run
What are three advantages of using a laptop?
More portable than a desktop
Good sized screens and keyboards
Can be used when not placed on a flat surface
What does a network interface card do?
prepares data for sending over the network
sends the data
controls the flow of data
What are these features of?
Telephone lines are used to connect devices on the Internet
Telephone lines were designed s carry analogue signals like the human voice
Computers work in digiatal
Modems convert digital computer signals to analogue so they can be transmitted and analogue to digital so computer can understand it
a modem (modulator / demodulator)
What do we call two or more computers that are linked together so that they are able to share resources
a network
What is a network?
A network is two or more computers that are linked together so that they are able to share resources
What is SMS usually known as?
Texting
What are three advantages of a desktop pc?
1) Web page is displayed fully as most web pages are designed to be viewed on a desktop
2) Larger keyboards make it easier to type
3) Larger screens provide a better viewing experience
What are these? Confined to a small area Usually located in a single building Use cable, wireless, infrared and microwave links that are usually owned by the organization Cheap to build Cheap to run
five features of a LAN
R______ connects to the I______t via an I__
Router connects to the Internet via an ISP
What allows computers and devices to connect wirelessly using signals that are broadcast using radio waves?
wi fi
What does this represent?
Firewall
Anti-virus
Web browser
Email account
You will also need an ISP (to connect to the Internet)
software is needed to set up a small network
What are five features of a WAN?
Cover a wide geographical area (e.g., between cities, countries and even continents)
In lots of different buildings and cities, countries, etc.
Use more expensive telecommunication links that are supplied by telecommunication companies
Expensive to build
Expensive to run
What are these?
A computer or a device
A wireless network interfae card (standard )
Access to a wireless hotspot
the things you need to connect to a wi fi network
What is VoIP?
Voice over Internet Protocol – used to make cheap phone calls over the Internet
To use Wi-Fi you need access to a r_____ and the I______
To use Wi-Fi you need access to a router and the Internet
What determines the exact location of a computer?
IP address
What Hardware required to set up a small network? (6 things)
Computers or devices (laptop, desktop PC, tablet)
Printer/ scanner
Router
Network interface cards (wired or wireless)
Network cabling
Telephone/ cable line to connect to Internet
Comparing wifi and Bluetooth:
What has the best signal range?
Wifi
Comparing wifi and Bluetooth:
which can have the most number of devices connected?
wifi
What are used to check who is using a network?
User-ID/username – used to allocate programs, settings, storage area and files
Password – used to ensure the person who is using the network is genuine
What are the features of a router?
can be wired or wireless
is used to join several networks together
is often used to connect several computers in the home to the Internet
‘Intelligent’ device
read data and decide where to send it
chooses the best route to transmit data on network
To do this it makes use of IP addresses
What are the advantages of a tablet? (two)
Small and light so very portable
Screens and keyboards are larger than on a smartphone making them easier to use/ view content
What does this describe?
Uses radio waves to transfer data over distances between 1 and 100 metres
Class 1 – up to 100m
Class 2 – up to 10m
Class 3 – up to 1m
Bluetooth?
What are these for?
User-ID/username – used to allocate programs, settings, storage area and files
Password – used to ensure the person who is using the network is genuine
They are used to check who is using a network
What do modems do?
Modems convert digital computer signals to analogue so they can be transmitted and analogue to digital so computer can understand it
What is this a list of?
Computers or devices (laptop, desktop PC, tablet)
Printer/ scanner
Router
Network interface cards (wired or wireless)
Network cabling
Telephone/ cable line to connect to Internet
Hardware required to set up a small network
Comparing wifi and Bluetooth:
What has the best signal reliability?
Bluetooth
Comparing wifi and Bluetooth:
what has the best (lowest) power usage?
bluetooth
How do you fit all of the software and hardware together to make a small network? (six things)
Sign up and pay for an account with an ISP (they will provide a router/ modem)
Connect the router to the telephone or cable line
Connect cabled devices to the router using the network cable – plugs into NIC on the devices and the ports on the router
Connect wireless devices to the router using Wi-Fi(password supplied by ISP)
Install firewall and anti-virus software on each device that will be on the network
Configure the router using Internet login details supplied by the ISP
What does this describe?
Codes files before sending over the Internet
If they are intercepted by hackers the data cannot be understood
Used for secure sending of banking/credit card details
Encryption
What are four devices used to access the internet?
Desktop PC
Laptop
Tablet
Smartphone
What does encryption do? (3 things)
Codes files before sending over the Internet
If they are intercepted by hackers the data cannot be understood
Used for secure sending of banking/credit card details
Computers on the same network have the same first few numbers
Computers on the same network are uniquely identified by the last few numbers of their what?
IP address
What are some shared resources on a network?
Hardware – printers, scanners, storage, etc.
Software – need only be installed on one computer
Data (e.g., database files)
An Internet connection
What are the three advantages of a smartphone?
Small size makes it highly portable
Internet can be accessed from anywhere with a Wi-fi or mobile data signal
Most people carry a mobile phone with them so they have internet access at any time
What type of computer offers these advantages?
More portable than a desktop
Good sized screens and keyboards
Can be used when not placed on a flat surface
A laptop
What are these?
Cover a wide geographical area (e.g., between cities, countries and even continents)
In lots of different buildings and cities, countries, etc.
Use more expensive telecommunication links that are supplied by telecommunication companies
Expensive to build
Expensive to run
five features of a WAN
What are the five disadvantages of a smartphone?
Small screen size can make it difficult to view the content
Small keyboard can make it difficult to use
Make it difficult for parents to monitor content viewed by children
Children may be exposed to unsuitable content
Expense
What is a disadvantage of using a desktop pc?
Restricted to one location as desktops are not portable.
What is a disadvantage in using a laptop?
Processors not as powerful as a desktop
What does this?
prepares data for sending over the network
sends the data
controls the flow of data
a network interface card
What is a switch?
is a similar device to a hub but more ‘intelligent’
can look at a packet of data to decide where it should go
It does this using Mac Addresses which uniquely identify an individual device on a LAN
R_____ can only broadcast the w______ signal over a limited distance. Typical limits are between ?m and ?m
Routers can only broadcast the wireless signal over a limited distance. Typical limits are between 50m and 100m
What does the following describe?
Computer or device with Bluetooth technology
Bluetooth needs to be turned on using settings on the device
Device scans for other Bluetooth devices in range
Send a request to join/ pair
Once paired data can be shared between the devices (when in range)
what you need to connect to a Bluetooth network
What is an example of a communication method over a network?
Voice over Internet Protocol / VoIP – used to make cheap phone calls over the Internet
Authentification
What are digital signatures used for?
Used with emails to check they are authentic
This means they are checked to make sure they came from the person they appear to be from
C_____ networks are faster and more secure than w_______
Cabled networks are faster and more secure than wireless
Comparing wifi and Bluetooth:
What has the best security?
wifi
What are these features of?
is used to join computers in a network
allows the connection of cables
allows the sharing of files and Internet access
not ‘intelligent’
data is broadcast to all devices on the network
The network will therefore be slow
Hub
To connect to a Bluetooth network the following is needed
?
Computer or device with Bluetooth technology
Bluetooth needs to be turned on using settings on the device
Device scans for other Bluetooth devices in range
Send a request to join/ pair
Once paired data can be shared between the devices (when in range)
What does this describe?
???? convert digital computer signals to analogue so they can be transmitted and analogue to digital so computer can understand it
Modem (Modulator/ demodulator)
What are these features of?
can be wired or wireless
is used to join several networks together
is often used to connect several computers in the home to the Internet
‘Intelligent’ device
read data and decide where to send it
chooses the best route to transmit data on network
To do this it makes use of IP addresses
Router
What kind of computer offers these advantages and disadvantages?
advantages
Small and light so very portable
Screens and keyboards are larger than on a smartphone making them easier to use/ view content
Disadvantages:
Depend on Wi-fi to connect to the Internet (Wi-fi is less reliable and less secure than a wired connection)
Small screens may means content may not display as well as on a laptop or a desktop PC
tablet
What does a hub do?
is used to join computers in a network
allows the connection of cables
allows the sharing of files and Internet access
not ‘intelligent’
data is broadcast to all devices on the network
The network will therefore be slow
What are features of a modem (modulator / demodulator)
Telephone lines are used to connect devices on the Internet
Telephone lines were designed s carry analogue signals like the human voice
Computers work in digiatal
Modems convert digital computer signals to analogue so they can be transmitted and analogue to digital so computer can understand it
To connect to a Wi-Fi network the following is needed???? (3 things)
A computer or a device
A wireless network interfae card (standard )
Access to a wireless hotspot
R_______ are used to provide a h______t to allow devices to c_______ to the Internet
Routers are used to provide a hotspot to allow devices to connect to the Internet
Comparing wifi and Bluetooth:
What has the fastest data speeds?
Wifi
What are these?
To allow devices like keyboards, mice, speakers and printers to be connected without the need for wires
Sharing mobile phone data between devices eg: contacts
Connecting to hands-free headsets – allows mobile phones to be used when driving
three uses of Bluetooth
what Allows multiple devices to share the same Internet connection
?
wi fi
How does Bluetooth work?
Uses radio waves to transfer data over distances between 1 and 100 metres
Class 1 – up to 100m
Class 2 – up to 10m
Class 3 – up to 1m
Areas where computers and devices can access the Internet are known as h________?
Areas where computers and devices can access the Internet are known as hotspots
What does this list show?
Sign up and pay for an account with an ISP (they will provide a router/ modem)
Connect the router to the telephone or cable line
Connect cabled devices to the router using the network cable – plugs into NIC on the devices and the ports on the router
Connect wireless devices to the router using Wi-Fi(password supplied by ISP)
Install firewall and anti-virus software on each device that will be on the network
Configure the router using Internet login details supplied by the ISP
How do you fit all of the software and hardware together to make a small network
What software is needed to set up a small network? (four things)
Firewall
Anti-virus
Web browser
Email account
You will also need an ISP (to connect to the Internet)
All computers and devices connected to the Internet are allocated a unique number called an ???
IP address
What type of computer offers these advantages?
1) Web page is displayed fully as most web pages are designed to be viewed on a desktop
2) Larger keyboards make it easier to type
3) Larger screens provide a better viewing experience
Desktop PC
What are these a feature of?
is a similar device to a hub but more ‘intelligent’
can look at a packet of data to decide where it should go
It does this using Mac Addresses which uniquely identify an individual device on a LAN
Switch
What is WPAN (Wireless personal area network) known as?
Bluetooth
What are these features of?
All computers and devices connected to the Internet are allocated a unique number called an IP address
The IP address determines its exact location
Computers on the same network have the same first few numbers
Computers on the same network are uniquely identified by the last few numbers of their IP addresses
IP address
What are three uses of Bluetooth?
To allow devices like keyboards, mice, speakers and printers to be connected without the need for wires
Sharing mobile phone data between devices eg: contacts
Connecting to hands-free headsets – allows mobile phones to be used when driving
