Information Modules are included in SNMPV2 and above. There are 3 types of SMI information modules, which are MIB modules, compliance statements, and capability statements.
MIB modules contain definitions of interrelated managed objects. Compliance statements provide a systematic way to describe a group of managed objects that must be implemented for conformance to a standard. Capability statements are used to indicate the precise level of support that an agent claims with respect to a MIB group.