Abstract Grid systems are highly variable environments, made of a series of indepen- dent organizations that share their resources, creating what is known as virtual organization, VO. This variability makes network quality of service (QoS) highly desirable, though it is very complex to achieve due to the large scale of inter- connected networks. The provision of network QoS in a Grid environment is the topic of interest of this work. In this paper, a taxonomy that characterizes and classifies various approaches for providing network QoS in Grid systems is presented. Also, the main proposals, developed by various world-wide projects, are surveyed to demonstrate the comprehensiveness of the taxonomy.
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