Software Defined Networking and Quality of Service in Advance Computer Networking

Running head: ADVANCE COMPUTER NETWORKING
Advance Computer Networking
Name of the Student
Name of the University
Author Note

1ADVANCE COMPUTER NETWORKING
Introduction to Software Defined Networking:
SDN of the Software Defined Networking works as the separator between the
forwarding plane and control plane. In the SDN the control plane control several different
devices. The software define networking is an architecture that is emerging and dynamic as
well. The use of the software define networking is cost effective, it is also manageable,
adoptable, it is ideal because of the high bandwidth and the nature that is dynamic towards
the application. This architecture eliminates the forwarding functions and the network
control. This enables the control of the network to become programmable directly and the
infrastructure that is underlying abstraction for the network services and the applications. The
foundational element of the Software designed networking building solutions is the
OpenFlow protocol.
There are various characteristics of the SDN architecture like the control of the
network is programmable directly as it is eliminate from the functions forwarding. This
follows agile approach as the abstract is controlled form the forwarding that allows the
administrator adjust the networks traffic flow dynamically to meet the changes that are
required. The intelligence of the network is in a controllers that is software based of the
software defines networking. This will maintain a good view of the network. The policy and
the application of these are appeared to be single switch that are logical. The software defined
networking allows the managers of the network to configure, secure, manage and optimize
the resource of network very fast using dynamic, software defined networking programs that
are automated, that they are able to write by themselves because of the programs which do
not depends on the proprietary software. SDN simplifies the design of the network and the
operations because of the provided instructions by the controllers of the SDN rather than
multiple, protocols and the devices of vendor specific.

2ADVANCE COMPUTER NETWORKING
Quality of Service in SDN:
The quality of services supports the end to end QoS in the networks that are existing
in the architecture. There are many solution of the limitation of the quality of services in the
software defined networking. Many of the approaches that are proposed by the different
researchers are not applied to the SDN as many are failed. In the response of the risks that are
associated with the architecture of the traditional networking. The main advantages of the
QoS is the global network that has centralized view, programmability, and the separation of
control plane and data plane. These kind of features helps the researchers to improve the
provisions of the QoS in the application of the network. The QoS motivated literature makes
the SDN networks OenFlow bye surveying the studies of the researches. The QoS gets
benefitted from the SDN concepts: mechanism of the inter domain routing, mechanism of the
multimedia flows routing, mechanism of resource reservation, management of queue and
mechanism of schedule, QoE (Quality of Experience) aware mechanism, mechanism of
network monitoring, and the other mechanism those are QoS centric like the QoS that is
based on the virtualisation management policy of the QoS. The QoS has the ability of the
OpenFlow protocol by reviewing the versions along with the well-known, community driven
and open source projects.
QoS Approaches:
There are two kinds of approaches that need to be taken into consideration in case of
Quality of Services or QoS. These approaches are the ones that have been introduced before
SDN had been developed, and the approach that had been developed along with the SDN
technology.