2016-08-172008-11-072005-03-14MELO, José Coelho de. Study of the Use of Mechanisms of QoS in Nets with You enlace of Short band. 2005. 136 f. Dissertação (Mestrado em Engenharia) - Universidade Federal do Maranhão, São Luis, 2005.http://tedebc.ufma.br:8080/jspui/handle/tede/380This work presents several ways of using mechanisms of Quality of Service (QoS) in networks hardwired for links of short band. It is demonstrated that the use of mechanisms of QoS brings profits of performance for priority applications and rationality in the use of band resources. The work is developed in a test platform of Previdência Social. Implementations of the PHBs EF, Afs and BE are tested. The work has evaluated the capacities to offer guaranteed band, traffic priority, conditioning of traffic and the impact of the competition between traffic classes. The experiments are mounted using the architecture of differentiated services (DiffServ) of platform Cisco, that is the standard in the network of the Previdência Social and are manipulated the mechanisms of classification, control of congestion, policing and conformation of traffic. The results give subsidy for implementation of some models of QoS in IP networks, mainly for those that serve short band.application/pdfAcesso AbertoServiços Diferenciados (DiffServ)Qualidade de Serviço (QoS)redes IPPolítica de QoSEnfileiramentoDifferentiated ServicesQuality of ServiceIP NetworksQoS PolicyQueuingCNPQ::CIENCIAS EXATAS E DA TERRA::CIENCIA DA COMPUTACAODissertação