What distinguishes cloud monitoring systems from their traditional IT counterparts?

When designing a CI solution, what switch configuration provides greater network capacity but is complex to manage?

What are examples of hybrid cloud use cases?

A cloud design contains multiple hosts that are running a hypervisor. Each host has only two physical 10Gb network adapters. The physical switch ports for each host must be configured as access ports. Each host will support numerous virtual machines that are on over 500 network segments.
Which technology is needed to support the network segmentation?

You plan to gather application performance data from an existing UNIX environment.
What should you use?