Reduction in the complexity of deploying and managing services, accelerating new service introduction, and reducing capital/operational expenditure overhead are key priorities for network operators today. These priorities are in part driven by the need to generate more revenue per user. But competitive pressures and increasing demand from consumers are also pushing them to experiment with new and innovative services. These services may require unique capabilities that are specific to a given network operator and in addition may require the ability to tailor service characteristics on a per-consumer basis. This evolved service delivery paradigm mandates that the network operator have the ability to integrate policy enforcement alongside the deployment of services, applications, and content, while maintaining optimal use of available network capacity and resources. Read More »
Tags: architect, capacity planning, Cisco, decoupling, delivery of services, deployment, engineers, extensibility, infrastructure, innovative services, Linux Containers, network topology, onePK, resource pooling, Servers, service appliances, service delivery, services, technology
By Steven Shepard, Contributing Columnist
When the telephone network became a commercial offering in the waning years of the 19th century, its architecture was quite different than the switch-centric, hub-and-spoke system that we have today. In that first iteration there was no concept of switching, the mechanical or electrical process of setting up a temporary connection between two parties for the duration of the call.
To talk with David on the telephone in those days, I would have had to have a dedicated circuit installed between my house and his. If I also wanted to be able to call my son or daughter, I would have to have additional circuits installed from my house to theirs.
This leads to what is known in the world of network topology as the “n times n minus one over two problem.” N is the number of people who want to be able to communicate with each other, and the little equation yields the number of circuits that must be installed to allow n people to talk with each other. Five people require ten circuits, but beyond that the number goes exponential. For a small city of 35,000 people like Burlington, Vermont, where I live, the number of circuits required to connect the city this way would be somewhere north of 600 million.
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Tags: communication networks, network topology, switching, telephone