What is clustering, and what advantages does it provide?

What will be an ideal response?

Clustering is the ability to increase the access to server resources and provide fail-safe services by linking two or more discrete computer systems so they appear to function as one. An immediate advantage of server clustering is the increase in computer speed or capacity to complete server tasks faster. Also, server clustering provides more computing power for handling resource-hungry applications. With clustering, as an organization adds more users and requires more demanding applications, one or more computers can be added to the cluster to handle the growth. This is a faster, less-expensive approach than having to purchase a larger computer and transfer users and applications to a new system because the old one is overwhelmed.