Monitoring systems are important for debugging and analyzing Wireless Sensor Networks (WSN). In passive monitoring, a monitoring network needs to be deployed in addition to the network to be monitored, named the target network. The monitoring network captures and analyzes packets transmitted by the target network. An energy-efficient passive monitoring system is necessary when we need to monitor a WSN in a real scenario because the lifetime of the monitoring network is extended and, consequently, the target network benefits from the monitoring for a longer time. In this work, we have identified, analyzed and compared the main passive monitoring systems proposed for WSN. During our research, we did not identify any passive monitoring system for WSN that aims to reduce the energy consumption of the monitoring network. Therefore, we propose an Energy-efficient Passive MOnitoring SysTem for WSN named EPMOSt that provides monitoring information using a Simple Network Management Protocol (SNMP) agent. Thus, any management tool that supports the SNMP protocol can be integrated with this monitoring system. Experiments with real sensors were performed in several scenarios. The results obtained show the energy efficiency of the proposed monitoring system and the viability of using it to monitor WSN in real scenarios.

Este artigo apresenta um software para auxílio no ensino de disciplinas que abordam o conteúdo de gerência de memória virtual. São implementados oito algoritmos de substituição de página, incluindo o Ótimo para fins de comparação de desempenho. A ferramenta possui um modo de simulação massiva dos dados, para fins de comparação de desempenho dos algoritmos e um modo interativo, onde o usuário pode visualizar o ”passo-a-passo”de cada etapa do processo de substituição de páginas.

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