Networks Flashcards by Noah Fenton

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

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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

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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

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What is VoIP an example of?

A communication method over a network

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What are these?
Hardware
Software
Data
An Internet connection

Shared resources on a network

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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

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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

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What does a network interface card do?

prepares data for sending over the network
sends the data
controls the flow of data

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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)

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What do we call two or more computers that are linked together so that they are able to share resources

a network

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What is a network?

A network is two or more computers that are linked together so that they are able to share resources

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What is SMS usually known as?

Texting

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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

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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

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R______ connects to the I______t via an I__

Router connects to the Internet via an ISP

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What allows computers and devices to connect wirelessly using signals that are broadcast using radio waves?

wi fi

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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

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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

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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

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What is VoIP?

Voice over Internet Protocol – used to make cheap phone calls over the Internet

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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

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What determines the exact location of a computer?

IP address

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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

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Comparing wifi and Bluetooth:

What has the best signal range?

Wifi

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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