What is a Resource Pool used for in vSphere?

A Resource Pool in vSphere is primarily used to allocate and manage resources such as CPU and memory within a cluster or host. This feature allows administrators to group virtual machines and allocate resources based on the specific needs or priority of various workloads. By creating resource pools, you can define how much of the available resources are given to each pool, which helps in ensuring that mission-critical applications receive the resources they require to function optimally while also allowing for efficient resource utilization among different workloads.

Resource pools also enable better management of resources in a multi-tenant environment, granting the ability to set resource limits and shares, which helps in prioritizing certain workloads over others. This is particularly useful in environments where different users or departments might have competing needs for resources, as it provides the capability to manage these demands effectively without manual intervention or constant monitoring.

The other options refer to functions that do not align with the specific purpose of resource pools. Creating backups is more closely related to backup solutions rather than resource allocation, isolating network traffic pertains to networking settings and security configurations within vSphere, and disaster recovery planning typically involves strategies for data replication and failover, rather than the direct management of resource allocation.