Flashcards
TEST REVISION LATEST 2018
Cards in this deck (27)
- 1What is a computer network?Two or more computers connected together to share information and resources.(this can involve physical or wireless connections,or both.)
- 2Describe a LANA LAN is a local area network and it is a connected set of computers and other devices
- 3Describe a WANA WAN is a wide area network and it covers a large geographical area. The internet is the biggest WAN in the world
- 4What are the advantages of a computer network?Software of a network is cheaper than individual licenses.
Users can share files, which prevents duplication of information - 5What are the disadvantages of a computer network?Wiring can be expensive to buy and install.
Security is an issue as a virus can affect all computers. - 6What devices are needed to produce a LAN?Network adaptor
Network medium
Cable connectors
Power supply
Hub/Switch/Router
Network Software. - 7What is the purpose of a NIC?The Network Interference Card (The NIC) converts Data signals from the nodes into data signals that can be transferred across the network.
- 8What is the purpose of a Router?Routers work by sending data between networks over the internet
- 9What is the purpose of a Hub?A Hub is a device that connects nodes together. Data is sent to all nodes across the whole of the network.
- 10What is the purpose of a Switch?A Switch is a device that connects nodes together and is an intelligent device that can send 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?A wireless access point is a hardware device on a local area network. the wireless access point usually connects to a router as a standalone device.
- 12What is the Internet?the internet is a huge network of computers all connected together. The internet is also a global computer network providing a variety of information and communication facilities.
- 13What is World Wide Web ?The World Wide Web is a collection of webpages found on the network of computers
- 14What is the purpose of a Modem?A modem is a device that provides access to the Internet. The modem connects to your ISP, which typically provides either cable or DSL Internet service. Cable modems have a coaxial (or "coax") connection, which is the same type of connector found on a TV or cable box.
- 15What is the purpose of an ISP?The ISP provides services accessing and using the internet. The ISP may be organised in various forms such as commercial and lots more
- 16What 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.
- 17What does HTTP stand for?HTTPS stands for Hypertext Transfer Protocol Secure, and instead of acting as its own application layer protocol, it uses separate protocols called SSL (Secure Sockets Layer) and TLS (Transport Layer Security).
- 18What is a URL?A Uniform Resource Locator (URL), colloquially termed a web address,[1] is a reference to a web resource that specifies its location on a computer network and a mechanism for retrieving it. A URL is a specific type of Uniform Resource Identifier.
- 19How 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.
- 20What are the three different network topologies?the bus network
the star network
the ring network - 21What are the advantages / disadvantages of a Star topology?Disadvantages of a Star Topology. Requires more cable length than a linear topology. If the hub, switch, or concentrator fails, nodes attached are disabled. More expensive than linear bus topologies because of the cost of the hubs
- 22What are the advantages / disadvantages of a Ring topology?Disadvantages of ring topology. All data being transferred over the network must pass through each workstation on the network, which can make it slower than a star topology. The entire network will be impacted if one workstation shuts down.
- 23What are the advantages / disadvantages of a Bus topology?Bus Topology. Alternatively referred to as a line topology, a bus topology is a network setup in which each computer and network device are connected to a single cable or backbone. The following sections contain both the advantages and disadvantages of using a bus topology with your devices
- 24List examples of data that need to be kept securepasswords
credit card numbers
personal information
your address
your family details
your salary
where you work
bank account
where you are during the days - 25What is HTTPS and what is it used for?HTTP is the underlying protocol used by the World Wide Web and this protocol defines how messages are formatted and transmitted, and what actions Web servers and browsers should take in response to various commands.
- 26What is encryption?the process of converting information or data into a code, especially to prevent unauthorised access.
- 27What is decryption?Decryption is the process of transforming data that has been rendered unreadable through encryption back to its unencrypted form.
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- Flashcards on TEST REVISION LATEST 2018, created by Hamza Mohammed on 15/12/2017.
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- Hamza Mohammed
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