Maintain Premium Maintenance coverage for an established Infoblox VM-1550 base deployment with a 1-year extended service term intended for year 4 and later. IB-MAIN-VM-1550-BASE-Y4+-01 applies to the VM-1550 base platform and represents service coverage rather than a hardware appliance, software license, or platform upgrade. The year 4+ designation matters when extending coverage beyond the earlier lifecycle years of a VM-1550 deployment. It provides the correct Premium Maintenance term for environments that continue to operate the same base virtual platform and need a one-year coverage period aligned to that later lifecycle stage. Use this service when the covered system is specifically an Infoblox VM-1550 base deployment and the required term is one year of extended Premium Maintenance from year 4 onward. The service is differentiated by its VM-1550 base-platform scope, Premium Maintenance level, one-year period, and applicability to later coverage years. It does not represent a general maintenance term for unspecified Infoblox platforms.