Compare Standard and Datacenter 16-core listings alongside access licenses. A 16-core pack is a stated quantity, not a promise that every server is fully covered. Physical cores, virtualization plans and access needs determine the complete purchase.
Before choosing: record processors, cores per processor, planned Windows Server virtual machines and people or devices accessing services. Keep base CALs and RDS CALs as separate lines in the plan.
Standard is a starting point for a physical server or light virtualization. Datacenter is worth comparing for many Windows Server virtual machines. With physical-core licensing, cover the host’s required cores; a 16-core pack is not automatically a complete license for every server.