4164881
Description
Flashcards by Daf (murrayd17), updated more than 1 year ago
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Created by Daf (murrayd17)
over 8 years ago
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| Question | Answer |
| Electronic mail. | |
| File Compression | A software program that is used to compress or decompress files using Algorithms. |
| Algorithms | A mathematical step-by-step sequence used to work out calculations or carry out instructions. |
| Levels of Access | These can be set by Network managers to allow individuals access to various files in a the network. In hierarchical order from lowest to highest the levels are: Read Only, Read/Write, Full Control. |
| POP3 - Post Office Protocol 3 | A client/server protocol in which e-mail is received and held for you by your Internet server. It's the most recent version of a standard protocol for receiving e-mail. |
| Matthew | Beautiful birthday boii. |
| Cc - Carbon Copy | A copy of an email to be sent to secondary recipients. |
| Bcc - Blind Carbon Copy | A copy of an email to be sent to secondary recipients where other recipients are unable to view each others email addresses. |
| SMTP - Simple Mail Transfer Protocol | An Internet standard for email transmission. It was last updated in 2008. |
| IMAP - Internet Message Access Protocol | IMAP is an Internet standard protocol used by e-mail clients to retrieve e-mail messages from a mail server over a TCP/IP connection. |
| Devices/Components | Used as a generic term to mean computers, peripheral hardware, mobile telephones, manufacturing plant, environment monitors and many other things. |
| Data | Any kind of information that has been formatted in a specific way. Different types of data include audio, video, images and monitoring signals, as well as text. |
| Peripheral | Any device, such as a printer, attached to a computer to expand its functionality. Scanners, printers, and speakers are peripheral devices for a computer because they aren't central to the working of the computer itself. |
| CODEC | A device or program used to encode or decode data to enable faster transmission. |
| Internet Packet | A formatted block of data sent over the networks and the internet. A packet contains the addresses of send and destination, the data and error checking. |
| Mbps - Megabits per second | Approximately a million bits can be transmitted through the media in one second. |
| Gbps - Gigabits per second | Approximately a thousand million bits can be transmitted through the media in one second. |
| Sun Spot Activity | From time to time there is the equivalent of a huge wave of flame released from the surface of the Sun. This releases millions of charged particles, some of which hit the Earth. These can cause disruption to data transmissions. |
| Geostationary Satellites | A satellite orbiting the Earth at a height of 35,786 km does so at the same speed that the Earth is rotating. It therefore appears to be stationary above a single point on the Earth’s surface. |
| Simplex Transmission | Sends data in one direction only. A radio broadcast is a good example of simplex transmission. |
| Half-duplex Transmission | Allows two-way transmissions but the devices don’t transmit at the same time so they both cannot send messages at the same time, like Walkie Talkies. Some network systems use half-duplex to maximise bandwidth. |
| Full duplex Transmission | Allows two-way communication at the same time. The telephone system, land or mobile, is an example of a full duplex system |
| Parallel transmission | A number of bits of data are transmitted simultaneously over an equal number of wires/channels allowing the bits in a whole byte of information to be transmitted together. It has a short range with an absolute maximum of around 5 metres. Once popular for connecting printers to computers but it is rarely used these days because of its cost and limited range. |
| Serial Transmission | Bits are transmitted one at a time over a single wire/channel reducing the cost of the cable, but gives a slower rate of data transfer. Bytes have to be disassembled into individual bits for transmission and then reassembled after receipt. It can be used over large distances. |
| Bi-directional Transmission | Essentially about transmitting bits in both directions. |
| Packet Switching | A mode of data transmission in which a message is broken into a number of parts (bits) which are sent independently, over whatever route is optimum for each packet, and reassembled at the destination. |
| Byte | In computing and telecommunications, a byte is unit of digital information which commonly consists of eight bits. |
| USB - Universal Serial Bus | A serial transmission method which was introduced to make many of the connections to a computer look the same. USB is used in a wide variety of devices, such as mobile telephones, memory sticks and MP3 players. USB ports also supply power to some devices. |
| Client Side Processing (advantages & disadvantages) | When the interaction between a web page and code occurs directly on a user’s computer. An example of this is Javascript. |
| Server Side Processing (advantages & disadvantages) | When the interaction between a web page and a computer is processed through a server. |
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