SNMP data types are encoded using Basic Encoding Rules (BER), which is a part of the Abstract Syntax Notation One (ASN.1) standard. BER is a protocol for representing data objects in a consistent and platform-independent manner. It defines a set of encoding rules that enable data to be transformed into a series of binary bytes that can be transmitted across a network.
SNMP data types can be encoded in several different ways, including integer, string, octet string, boolean, null, and object identifier. Each data type is encoded in a unique way, based on its format and structure. For example, integers are encoded using a two’s complement representation, while strings are encoded using a length-prefix followed by the characters in the string. Ber encoding also includes support for complex data types, such as sequences and sets, which can be used to represent more sophisticated data structures.