TApxProtocol.Overhead

TApxProtocol

property Overhead : Word

Determines the number of overhead bytes per data block used by EstimateTransferSecs.

When a protocol transfers a data block, not all of the bytes are actually data from the file being transferred. Some of them are part of the packet header and others may be used to quote or escape data characters that cannot be transmitted as-is.

When a protocol is selected by assigning the ProtocolType property, the TApxProtocol component assigns a default value to Overhead that matches the characteristics of the protocol. For some protocols the exact value of Overhead depends on the actual data being transmitted, but the default is a reasonable estimate that gives reasonable transfer time estimates. If the estimates are consistently in error, a new value can be assigned to Overhead.

See also: EstimateTransferSecs, TurnDelay