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Obtaining VoIP security through the IPsec protocol increases packet size, thus substantially increasing the network overhead. One way of mitigating such a problem consists of multiplexing calls so that the transmission of redundant data is reduced. The performance of such technique is directly linked to the number of concurrent calls; however, in more constrained scenarios, the existence of several...
The use of Web services in network management has became a reality after recent researches and industry standardization effort. Although performance is a critical issue, as well as security support, no investigation so far has observed how secure Web services communications perform when employed for network management. In this paper we present a first investigation in this subject by evaluating the...
Recent investigations of management traffic patterns in production networks suggest that just a small and static set of management data tends to be used, the flow of management data is relatively constant, and the operations in use for manager-agent communication are reduced to a few, sometimes obsolete set. This is an indication of lack of progress of monitoring processes, taking into account their...
The composition of network management information is a feature widely required but not properly supported in traditional management technologies. Web services technology has been investigated to enable more sophisticated management solutions. In this paper, we show that Web services have more to offer to the network management discipline than just bridging established management protocols and Web-based...
Service composition is a technique that may help the development of management systems by aggregating smaller services to produce more sophisticated ones. Service composition can be realized by using traditional management technologies, although these technologies have not been conceived taking composition support as one of their main aspects. Current service-oriented architecture (SOA)-related efforts,...
The composition of network management information is a feature widely required but poorly supported in traditional management technologies. Recently, Web services for network management has been enabling the investigation of more sophisticate management solutions, even though some concerns related to the Web services performance have been initially exposed, but quickly disappeared after the first...
Web services against SNMP comparisons have been carried out by the network management community in order to understand the impact on adopting Web services as a management tool. In these comparisons, however, notification messages have been neglected to a secondary plane in such a way that the current conclusions about the performance of Web services may not apply for networks extensively managed via...
The COPS-PR protocol has been defined by the IETF to provide policy provisioning in networks managed through the policy-based network management approach. Although some network players already ship their devices with proper COPS-PR support, there is a trend in the industry and in the IETF of discontinuing COPS-PR as a policy protocol. Meanwhile, two other protocols, namely NETCONF and SOAP, have been...
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