VMware vSphere Network I/O Control (NIOC) is a network resource control engine used to provide quality of service (QoS) capabilities to VDS; usually, it's used to guarantee the network bandwidth or manage this in a proper way for business-critical applications (or for VMkernel traffic) and to resolve situations where several types of traffic compete for common resources.
Objective 2.2 for VCP65-DCV and VCP6-DCV is exactly the same because there weren't big changes in networking from vSphere 6.0 to vSphere 6.5.
The vSphere 6.5 Networking guide contains in-depth pieces of information about networking capabilities and configurations: https://docs.vmware.com/en/VMware-vSphere/6.5/vsphere-esxi-vcenter-server-652-networking-guide.pdf.
