Flashcards
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Flashcards do conjunto (27)
- 1What is a computer network?2 or more computers linked together to share and resources
- 2Describe a LANLan (local area network) is a network linked together by cables
- 3Describe a WANWan(wireless are network) is a network linked together by WiFi.
- 4What are the advantages of a computer network?The advantages of a computer is you get to share information between computers and licences are likely to be cheaper than buying several standalone licences.
- 5What are the disadvantages of a computer network?There are no disadvantages
- 6What devices are needed to produce a LAN?Network Adaptor. A computer needs a network adaptor to connect to a network. ...
Network Medium. Wired networks need cable. ...
Cable Connectors. ...
Power Supply. ...
Hub/Switch/Router. ... - 7What is the purpose of a NIC?It has to converts the data signals from the nodes into data signals that can be transferred across the network.
- 8What is the purpose of a Router?A router is needed to connect to the internet to use LAN. Routers work by sending data between networks
- 9What is the purpose of a Hub?A device that connects nodes together. Its not intelligent, data is sent to all nodes across the whole of the network.
- 10What is the purpose of a Switch?A device that connects nodes together. An intelligent device that can sends data to the nodes that the data is intended for. This reduces network traffic because making the network run faster.
- 11What is the purpose of a WAP?In computer networking, a wireless access point (WAP), or more generally just access point (AP), is a networking hardware device that allows a Wi-Fi device to connect to a wired network.
- 12What is the difference between a Hub and a Switch?A hub is not intelligent but a switch is.
- 13what is the interneta global computer network providing a variety of information and communication facilities,
- 14what is the world wide weban information system on the Internet which allows documents to be connected to other documents
- 15What is the purpose of a Modem?It converts digital signals generated by the computer into analog signals which can be transmitted over a telephone or cable line and transforms incoming analog signals into their digital equivalents.
- 16What is the purpose of an ISP?It is an organization that provides services accessing and using the Internet. Internet service providers may be organized in various forms, such as commercial, community-owned, non-profit, or otherwise privately owned.
- 17What is an IP address?A unique string of numbers separated by full stops that identifies each computer using the Internet Protocol to communicate over a network.
- 18What does HTTP stand for?Hypertext Transfer Protocol
- 19What is a URL?The address of a World Wide Web page
- 20How is a URL constructed?A URL can be thought of as the "address" of a web page and is sometimes referred to informally as a "web address." ... A URL is made up of several parts. The first part is the protocol, which tells the web browser what sort of server it will be talking to in order to fetch the URL
- 21What are the three different network topologies?Star
ring
bus - 22What are the advantages / disadvantages of a Star topology?Advantages
• Fastest performance
• Easy to install and to expand with extra nodes
• A failure in the minor cables will only affect one node
Disadvantages
• Uses the most cable which makes it more expensive
• An extra hub or switch further increases the cost - 23What are the advantages / disadvantages of a Ring topology?Advantages
• One-way system so not affected by heavy traffic
Disadvantages
• Cable failure anywhere will affect the whole network
• Need to ‘break’ the ring in order to add a new node
All nodes must be switched on - 24What are the advantages / disadvantages of a Bus topology?Advantages
• The simplest and cheapest to install and extend
• Failure of one node does not affect the rest of the bus network
Disadvantages
• If the main bus cable fails then the whole network will fail
• Performance of the network slows down rapidly with more nodes or heavy network traffic - 25List examples of data that need to be kept secure1)making regular backups of files (backup copies should be stored in fireproof safes or in another building)
2)protecting yourself against viruses by running anti-virus software.
3)using a system of passwords so that access to data is restricted - 26What is HTTPS and what is it used for?Hyper Text Transfer Protocol Secure
- 27What is encryption?The process of converting information or data into a code, especially to prevent unauthorized access.
Informações
- Descrição
- FlashCards sobre Revision, criado por Jamie Johnson em 15-12-2017.
- Criado por
- Jamie Johnson · dez 2017
- Atualizado
- 6 jan 2018
- Visualizações
- 23
- Avaliação