A network resource pool is actually a very interesting concept, NIOC should be enabled before hand. Essentially you can edit the VMs NIOC directly or you can create a network resource pool on a VDS and reserve the amount of bandwidth per uplink, say you have 4 hosts with 2 10GB adaptors attached to the hosts and you reserve 2 GB per host, less than the 75% of slowest adaptor maximum, then you would have 4 * 2 * 2 = 16GB of bandwidth to reserve for your NRPs. From there you can actually add a port group with VMs attached to this NRP. So let’s say for example you have a critical set of VMs in charge of payroll processing and they’re all on the payroll port group in their separate vLAN, you could create a NRP and assign their port group to it and have reserved bandwidth for them in times of contention!