Computer - Sciene

          Caching is the technique of storing the frequently used data in a fast memory, either at a client or at a server, which is connected to clients via a network.

Clustering is a discipline devoted to find and describe cohesive or homogeneous chunks in data, the clusters. An example of clustering problem is the automatic revealing of meaningful parts in a digitalized image. The motivation for the focus on data clustering is the fact that data clustering is an important process in pattern recognition and machine learning. Clustering algorithms are used in many applications such as image segmentation, vector and color image quantization, compression, etc.

In today’s environment nearly all end-to-end telephone connections are set up via circuit-switching using Public Switched Telephone Network (PSTN),whereby node-to-node links in an origin/destination connection are set up via interconnects, and the connection is maintained exclusively for exchanges of information between the origin and destination until it is torn down.