You are the head of the Network Administrators department. And one of your subordinates uses SNMP to manage networked devices from a remote location. And one of your subordinates uses SNMP to manage networked devices from a remote location. To manage network nodes, your subordinate uses MIB, which contains formal descriptions of all network objects managed by SNMP. He accesses the contents of MIB by using a web browser either by entering the IP address and Lseries.mib or by entering the DNS library name and Lseries.mib. You know that your subordinate can retrieve information from a MIB that contains object types for workstations and server services. Which of the following types of MIB will your subordinate use to retrieve information about types for workstations and server services?