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This new edition of the seminar entitled "Communication Systems IV"discusses a number of selected topics in the area of computer networks and communication systems. The first talk on "Is the Cloud Green?" addresses cloud computing and green ICT (Information and Communication Technology). Talk two on "Economic and Technical Analysis of BotNets and Denial-of-Service Attacks" gives an overview of denial of service attacks and with that the existence of big collections of compromized computers also known as BotNets. Talk three on "Environmental Monitoring Using Sensor Networks" discusses the environmental monitoring by means of sensors, describes the generic functioning of environmental sensor networks and points out the main advantages as well of challenges of this application. Talk four on "DNS Security Extensions" presents various types of DNS (Domain Name System) security flaws and it introduces DNSSEC as a new standard to address these flaws. Finally, talk ve on "State of the Art of Service Component Architecture" gives an overview of the Service Component Architecture as a recent specification to simplify and unify application development within the context of a SOA (Service-Oriented Archtitecture).

Communication systems IV

Communication systems IV

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