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Key words

• Byte, USB, Client side processing (example and advantages/disadvantages), Server side processing (example and disadvantages/disadvantages), Bi-directional transmission, Packet switching, simplex, Half duplex, full duplex

BYte

• In computing and telecommunications, a byte is unit of digital information which commonly consists of eight bits.

USB

• universal serial bus is a serial transmission method which was introduced to make many of the connections to a computer look the same. Nowadays 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. The maximum theoretical transmission rate for USB 2.0 is 480 Mbps, but this is shared among all devices on a USB hub, so the rate for each device will be less than this.

Client side processing

• client-side processing is the use of a scripting language to create code on web pages which provides interactivity. The important point is that the interaction takes place within the web page and the code is downloaded to the user’s computer when the web page is opened by the user’s browser. A good example of a client-side interaction is a roll over (often called a mouse over), where some code is triggered when you move the mouse over a particular part of the web page. This might be something simple like the display of an advertisement, or it could be a demand for some data entry.

server side processing

• server side processing involves the use of scripts which reside and are run on another computer on the internet (the web server). Information is submitted to a server which
• processes it to provide results in the form of a web page. A good example of server-side processing is the submission of a search through a search engine. The search engine matches the word or phrase against an index of website content on the web server using scripts

Bi-directional transmission

• Bi-directional transmission has several meanings within data communication, but it is essentially about transmitting in both directions. Most recently the term has been applied to fibre optics. Using the current technology, light passes in one direction only, so you have to add extra fibres to the bundle to carry a signal in the opposite direction.

Packet switching

Simplex

Half duplex