You are requested by your organization to improve the quality of the VoIP system. Discuss methods that can enhance VoIP quality. How do infrastructure overlays play a part? Solution To minimize VoIP call quality issues, adopt the following steps: Overlay networks offer an alternative to modifying Internet protocols or routers, providing a quick and easy deployment path that lacks many of the technical and political hurdles of a router-level deployment. Another benefit of overlays is that they avoid burdening the underlying network with features better performed at higher layers.Also ,overlay can take advantage of the large glut of processing, memory, and permanent storage available in commodity hardware to perform tasks that would ordinarily be well beyond the ability of a conventional router, such as expensive cryptographic operations, file caching, or database lookups. In infrasturuture overlay , the overlays nodes performs the roles of server and router . The Clients are some nodes that are external to the overlay . In this type of overlay , the overlay nodes can be thought of as being under the control of one service provider , having high availability and connected to a high bandwidth network. Clients are external machines whose request are serverd by Content distribution network . Infrastructure overlay still maintain the clean separation between the service provider and consumer .This added flexibility available to the service provider is that client request can be routed to the appropriate servers using some knowledge that is available to the service provider . Infrastructure overlay is likely to have high bandwidth network connection and therefore does not have to deal with heterogeneity of resources as is typical with the end-hosts where the users can connect using fiber-to-the home as well as slow modem . .

1. You are requested by your organization to improve the quality of the VoIP system. Discuss
methods that can enhance VoIP quality. How do infrastructure overlays play a part?
Solution
To minimize VoIP call quality issues, adopt the following steps:
Overlay networks offer an alternative to modifying Internet protocols or routers, providing a
quick and easy deployment path that lacks many of the technical and political hurdles of a router-
level deployment. Another benefit of overlays is that they avoid burdening the underlying
network with features better performed at higher layers.Also ,overlay can take advantage of the
large glut of processing, memory, and permanent storage available in commodity hardware to
perform tasks that would ordinarily be well beyond the ability of a conventional router, such as
expensive cryptographic operations, file caching, or database lookups.
In infrasturuture overlay , the overlays nodes performs the roles of server and router . The Clients
are some nodes that are external to the overlay . In this type of overlay , the overlay nodes can be
thought of as being under the control of one service provider , having high availability and
connected to a high bandwidth network. Clients are external machines whose request are serverd
by Content distribution network . Infrastructure overlay still maintain the clean separation
between the service provider and consumer .This added flexibility available to the service
provider is that client request can be routed to the appropriate servers using some knowledge that
is available to the service provider .
Infrastructure overlay is likely to have high bandwidth network connection and therefore does
not have to deal with heterogeneity of resources as is typical with the end-hosts where the users
can connect using fiber-to-the home as well as slow modem .