Variable names are in the format of Object Identifiers (ASN.1). There are several methods of representation. Each variable name is given in the format of A.B.C.D..., where A, B, C, and D are subidentifiers in one of two forms of notation. Each subidentifier may be encoded as a decimal integer, or a symbol as found in the RFC1066 MIB. The case of the symbols is not significant.
All refer to the same variable name.
The description of the variables in the MIB is given in the set of MIB files defined by the MIBS environment variable (or the default list defined at compilation time) and the MIB files in the $HOME/snmp/mibs directory (or the MIBDIRS environment variable).
All UNIX systems. Windows 7. Windows Server 2008 R2. Windows 8. Windows Server 2012. Windows 10. Windows Server 2016.