11770289
Description
Flashcards by Jamie Johnson, updated more than 1 year ago
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Created by Jamie Johnson
over 6 years ago
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| Question | Answer |
| What is a computer network? | 2 or more computers linked together to share and resources |
| Describe a LAN | Lan (local area network) is a network linked together by cables |
| Describe a WAN | Wan(wireless are network) is a network linked together by WiFi. |
| What 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. |
| What are the disadvantages of a computer network? | There are no disadvantages |
| What 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. ... |
| What 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. |
| What 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 |
| What 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. |
| What 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. |
| What 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. |
| What is the difference between a Hub and a Switch? | A hub is not intelligent but a switch is. |
| what is the internet | a global computer network providing a variety of information and communication facilities, |
| what is the world wide web | an information system on the Internet which allows documents to be connected to other documents |
| What 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. |
| What 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. |
| What 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. |
| What does HTTP stand for? | Hypertext Transfer Protocol |
| What is a URL? | The address of a World Wide Web page |
| How 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 |
| What are the three different network topologies? | Star ring bus |
| What 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 |
| What 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 |
| What 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 |
| List examples of data that need to be kept secure | 1)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 |
| What is HTTPS and what is it used for? | Hyper Text Transfer Protocol Secure |
| What is encryption? | The process of converting information or data into a code, especially to prevent unauthorized access. |
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