[ASN.1] logic for this OID?

[Harsha . Mangalmurti]

while studying   ASN.1 specs i am not very clear about this perticular OID
i will like to know the logic and procedure for representation of this OID
and all those where the value is more than FF.

the OID   -         1     0      8571     2

represented as      T    L    V
               06   04   28   C2  7B   02


here the 8571 is represented as C2 7B i am not clear about this part.
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