Flashcards
Networks
Flashcards do conjunto (7)
- 1What is a computer network?Two or more computers connected together to share information and resources.
- 2What is a LAN?- A LAN is a Local Area Network
- It is a connection of computers and device
- Each device on a network is known as a node
- It is confined to one site
- It is therefore relatively small
- All network infrastructure is owned by the organisation - 3What are the advantages of a LAN?It enables:
- digital communication between people
- the sharing of digital information
- the sharing of peripheral devices
- computers to be updated with the latest software from a central point
- distrusted processing (when a single program can be run simultaneously at various computers) - 4What are the disadvantages of a LAN?- They require expertise to install and maintain which can be costly
- Network problems affect all users
- Security may be a problem because data is accessible from many places - 5What hardware is needed for a LAN?At least two computers (nodes); an NIC (Network Interface Card) which converts the data signals from the nodes into data signals that can be transferred across the network
- 6What is a 'Hub'?A hub is a device that connects nodes together. It makes all the connected nodes act at a single segment. It is not intelligent - data packets are transmitted across the whole of the network. They are cheap and USB hubs are useful in home computer installations.
- 7What is a switch?A switch is a device that connects nodes together. It is an intelligent device that can create and connect to different segments of the network.
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- FlashCards sobre Networks, criado por Alasdair Irvine em 07-04-2017.
- Criado por
- Alasdair Irvine
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