IPv6
Internet Protocol Version 6 is abbreviated
to IPv6 (where the "6" refers to
it being assigned version number 6). The previous
version of the Internet Protocol is version
4 (referred to as IPv4).
IPv6 is a new version of IP which is designed
to be an evolutionary step from IPv4. It is
a natural increment to IPv4. It can be installed
as a normal software upgrade in internet devices
and is interoperable with the current IPv4.
Its deployment strategy is designed to not
have any flag days or other dependencies.
IPv6 is designed to run well on high performance
networks (e.g. Gigabit Ethernet, OC-12, ATM,
etc.) and at the same time still be efficient
for low bandwidth networks (e.g. wireless).
In addition, it provides a platform for new
internet functionality that will be required
in the near future.
IPv6 includes a transition mechanism which
is designed to allow users to adopt and deploy
IPv6 in a highly diffuse fashion and to provide
direct interoperability between IPv4 and IPv6
hosts. The transition to a new version of
the Internet Protocol must be incremental,
with few or no critical interdependencies,
if it is to succeed. The IPv6 transition allows
the users to upgrade their hosts to IPv6,
and the network operators to deploy IPv6 in
routers, with very little coordination between
the two.
NGN
NGN is a concept for defining and deploying
networks, which, due to their formal separation
into different layers and planes and use
of open interfaces, offers service providers
and operators a platform which can evolve
in a step-by-step manner to create, deploy
and manage innovative services
Wireless
Network
A term describing a computer network where
there is no physical connection (either
copper cable or fibre optics) between sender
and receiver, but instead they are connected
by radio. Applications for wireless networks
include multi-party teleconferencing, distributed
work sessions, personal digital assistants,
and electronic newspapers. They include
the transmission of voice, video, images,
and data, each traffic type with possibly
differing bandwidth and quality-of-service
requirements. The wireless network components
of a complete source-destination path requires
consideration of mobility, hand-off, and
varying transmission and bandwidth conditions.
The wired/wireless network combination provides
a severe bandwidth mismatch, as well as
vastly different error conditions. The processing
capability of fixed vs. mobile terminals
may be expected to differ significantly.
This then leads to such issues to be addressed
in this environment as admission control,
capacity assignment and hand-off control
in the wireless domain, flow and error control
over the complete end-to-end path, dynamic
bandwidth control to accommodate bandwidth
mismatch and/or varying processing capability.
3G
Third generation (3G) is a term that has
received and continues to receive much attention
as the enabler for high-speed data for the
wireless mobility market. 3G and all it
is meant to be are defined in the ITU specification
International Mobile Telecommunications-2000
(IMT-2000).
Ubiquitous
computing
Computers everywhere. Making many computers
available throughout the physical environment,
while making them effectively invisible
to the user. Ubiquitous computing is held
by some to be the Third Wave of computing.
The First Wave was many people per computer,
the Second Wave was one person per computer.
The Third Wave will be many computers per
person. Three key technical issues are:
power consumption, user interface, and wireless
connectivity. The idea of ubiquitous computing
as invisible computation was first articulated
by Mark Weiser in 1988 at the Computer Science
Lab at Xerox PARC.
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