Thresholds: Revisit the Strings Versus Clouds Debate for the Internet Architecture, Part II: QoS, Control, Management, and TCP

Authors:
Wei K. Tsai;Mahadevan Iyer;Jordi Ros
Affiliations:
ECE Department, University of California, Irvine, California/ wtsai@ece.uci.edu;ECE Department, University of California, Irvine, California/ miywe@ece.uci.edu;ECE Department, University of California, Irvine, California/ jros@ece.uci.edu
Venue:
Journal of Network and Systems Management
Year:
2002

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Abstract

The clouds (IP) versus strings (connection-oriented) debate over the Internet architecture is reexamined. Controllability and observability are shown to be the key to the performance (QoS) of the networks. The clouds architecture treats the network as a black box, making it uncontrollable and unobservable; in contrast, the strings architecture was designed to be a controllable and observable structure. In network management, the need for centralized management and control to obtain efficiency and optimal performance argues for strings architecture. Finally, TCP is shown to be unscalable in performance because of its poor observability and controllability.