Marker PDU Aligned Framing for TCP Specification Status of This MemoThis document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited.
AbstractMarker PDU Aligned Framing (MPA) is designed to work as an "adaptation layer" between TCP and the Direct Data Placement protocol (DDP) as described in RFC 5041. It preserves the reliable, in-order delivery of TCP, while adding the preservation of higher-level protocol record boundaries that DDP requires. MPA is fully compliant with applicable TCP RFCs and can be utilized with existing TCP implementations. MPA also supports integrated implementations that combine TCP, MPA and DDP to reduce buffering requirements in the implementation and improve performance at the system level.
This article is intended to extend our previous analysis (Journal of Social Policy, Vol. 2, Part 3, July 1973) of explanations of the development of social policy. Some problems associated with the preparation of historical accounts are examined and we proceed to review the value of international comparisons of welfare developments as a device for avoiding some of these problems. We look at some examples of studies that have utilized international comparisons and the problems involved in attempting such studies. Our conclusion is that the use of the comparative method is valuable, not because it enables us to get any nearer the truth about welfare developments, but rather because the range of plausible explanations that it will generate makes us more aware of the variety of perspectives on welfare activities that can exist and of the multitude of value-systems that are embodied in these perspectives.
The resources of sociology do not appear to have been extensively or systematically utilized in the study of social policy and administration. One source of evidence for this statement is the absence of explicit references to sociological theories in some of the most well known general texts on British social policy and administration. Pinker's recent analysis of social theory and social policy also lends support to the view that there has been, and still remains, something of a division between sociologists and students of social policy and administration. He concludes that the ‘founding fathers’ of sociology (Marx, Durkheim, Weber and Spencer) had a tendency to be ‘not greatly interested…(in)…remedies for social problems’, and makes the general observation that ‘sociologists have been oddly diffident about the subject-matter of social administration’, possibly because of the latter's atheoretical nature.
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