Colocation Defined
Colocation Glossary Index
For definitions associated with co-location and datacentres, please browse the glossary of terms below.
Video on Demand
The ability to activate a stored or live motion picture stream; in xDSL the application that allows subscribers to view movies or other video programming on request, similar to cable television's Pay-Per-View.
Videoconferencing
Allows two or more people to meet "face-to-face" as easily as dialling a telephone call.
A small camera captures the image of the users. Modern data compression techniques allow this image together with high quality speech to be carried in the two 64 kbps B- channels of an ISDN Basic Rate Access (BRA). For three or more people to use this technology, a video conference "bridge" is needed to switch the speed and images.
Voice Mail
Enables callers to leave a message much like an answerphone but this message can then be reviewed, copied, stored, annotated and forwarded to one or many people in one go. Sometimes called voice messaging.
Voice over IP
The ability to make calls and send faxes over IP-based data networks such as the Internet, whilst simultaneously being online. It overcomes the problem of tying up your only telephone line whilst browsing the web as calls can be made at the same time.
VPN
Virtual private network is, a network that is constructed by using public wires to connect nodes. For example, there are a number of systems that enable you to create networks using the Internet as the medium for transporting data. These systems use encryption and other security mechanisms to ensure that only authorised users can access the network and that the data cannot be intercepted.
