I understand the relationship between Bytes, Words, and Longs. But those rules do not apply to SNMP.
Check out
http://luca.ntop.org/Teaching/Appunti/asn1.html
And note that the rules apply no matter what processor you are using - AVR or Apple A5 or Intel. They are part of the SNMP protocol.
I can't understand this well enough to find the answer myself. I was hoping one of the people on the Agentuino project could
answer this.