In layered systems, PDU represents a unit of data specified in the protocol of a given layer, which consists of protocol control information and user data. PDU is a significant term related to the initial four layers of the OSI model. In Layer 1, PDU is a bit, in Layer 2 it is a frame, in Layer 3 it is a packet and in Layer 4 it is a segment. In Layer 5 and above, PDU is referred to as data.
During Reconstruction, however, the conflict over labor resulted in the sharecropping system, in which black families would rent small plots of land in return for a portion of their crop, to be given to the landowner at the end of each year.nstead of receiving wages for working an ownerâs landâand having to submit to supervision and disciplineâmost freedmen preferred to rent land for a fixed payment rather than receive wages. By the early 1870s, the system known as sharecropping had come to dominate agriculture across the cotton-planting South.
Despite the common perception that sharecropping was a black institution, sharecroppers were drawn from the ranks of all poor Georgians. In 1910, of the state's 27 million farm acres, tenants operated 11 million acres; black Georgians farmed slightly more than half of this tenant-tilled acreage.