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Resilient Packet Ring (RPR) is a new networking standard developed by the IEEE LAN/MAN working group. RPR is an insertion buffer, dual ring technology, utilizing a back pressure based fairness algorithm to distribute bandwidth when congestion occurs. In its attempt to distribute bandwidth fairly, the calculated fair rate in general oscillates and under some conditions the oscillations continue indefinitely...
The Reliable Server Pooling (RSerPool) protocol suite currently under standardization by the IETF is designed to build systems providing highly available services by providing mechanisms and protocols for establishing, configuring, accessing and monitoring pools of server resources. While availability is one main aspect of RSerPool, load distribution is another. Since most of the time a server...
The hub-and-spoke architecture of a star network dates to the telecommunications central switching office. However, its benefits are only beginning to be explored in network-centric global applications. The hub facilitates interaction between dissimilar and distant systems. It serves multiple roles: translator between communication formats; subscription manager; multi-level data access controller;...
In the area of networking, as in computer systems, performance evaluation problems typically arise in scenarios where the availability of resources is limited. In many situations, buffering is provisioned at the resource site. This is the case of multiplexers and switches, where a buffer may precede a processing unit or a communication link. In other situations, buffering cannot be provisioned at...
Virtual Private Networks (VPNs) are commonly used to provide secure connectivity over public networks. VPNs use tunnels to provide encryption, compression, and authentication functions, which are identically applied to every packet passing through them. However, this behavior may be overly rigid in many situations where the applications require different functions to be applied to different parts...
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