Modes of service
The Transport Interface provides two modes of service:
is circuit-oriented and enables the transmission of data
over an established connection in a reliable, sequenced manner.
It also provides an identification procedure that avoids the overhead
of address resolution and transmission during the data transfer
This service is attractive for applications that
require relatively long-lived, datastream-oriented interactions.
is message-oriented and supports data
transfer in self-contained units with no logical relationship
required among multiple units.
This service requires only a preexisting association between the
peer users involved, which determines the characteristics of
the data to be transmitted.
All the information required to deliver a unit of data
(for example, the destination address) is presented to the
together with the data to be transmitted, in one service
access (which need not relate to any other service access).
Each unit of data transmitted is entirely self-contained.
Connectionless-mode service is attractive for
involve short-term request/response interactions
exhibit a high level of redundancy
are dynamically reconfigurable
do not require guaranteed, in-sequence delivery of data
© 2004 The SCO Group, Inc. All rights reserved.
UnixWare 7 Release 7.1.4 - 27 April 2004