Campus Network Design - a new
approach
What is a campus
network?
It is a network that connects many users and is under the control
of a single administrative group. The campus network can spread over a
set of buildings and these buildings may be closely spaced or some
miles apart. The network is likely to have to support many different
types of users with a variety of needs from their IT.
Why a new approach?
For 20 or more years, the tenets of computer network design
have remained fairly solid. The goal of the network was to provide a
bit-pipe on-demand between any two points. Despite minor physical layer
changes and improvements, the three tier model for network design has
remained the map to providing an efficient network.
As network demands increased, the internetworking hardware available
became faster and more sophisticated in terms of options.
Unfortunately, the physical layer performance has not increased in line
with Moore's law meaning that PC performance increase has
overtaken the increases in performance of the network.
Gone are the days whan the average user was content to browse static
HTML and send a few emails. PC users today are
much more demanding for interactivity and use a
range of networked applications, many of which are hungry for
bandwidth. Youtube, torrents, peer-to-peer file sharing, Myspace and
SecondLife are
just some examples of networked applications that demand bandwidth from
their attached network.
Computer applications and their attached networks have penetrated
nearly every business, replacing the analogue parts of the
work-model wherever possible and increasing efficiency, accuracy
and availability. The network itself has become a company resource and
is an indispensable part of the majority of today's businesses. The
performance of the network in delivering the benefits of the
applications running on the attached computers is key to the successful
operation of the business that the network is supporting.
Hardware Changes to allow new Design
The distribution layer will need to contain intelligent devices to
carry out the deep packet inspection. This does not dramatically change
the role of this layer and leaves the core unchanged. Access layer may
need newer technologies to implement security at the required level.
Exactly how these changes may be implemented will be the focus of later
lectures in this course.
View the ppt
Listen to the audio
Answer the questions
relating to the audio
Read the pdf document Application
Intelligence