Differentiated services
# the last 2 bits are not used but first 6 bits make up the code point subfield which can be used in 2 different ways
- when the 3 right-most bits are 0s, the 3 left-most bits are interpreted the same as the precedence bits in the service type interpretation
- when the 3 right-most bits are not all 0s, the 6 bits define 64 services based on the priority assignment by IETF or local authorities (organizations)