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Routing policies and the complexity of network give rise to violations of the Triangle Inequality with respect to delay (Round-Trip Time) in the Internet. Most of the network coordinate (NC) systems, for example Vivaldi, suffer from inaccurate distance estimation due to such Triangle Inequality Violations (TIVs). In this abstract, we propose a methodology to overcome TIVs by introducing medium in...
Based on the transit behavior, we categorize the Internet backbones into two types, global-transit backbone and partial-transit backbone. Partial-transit backbone represents the majority of R&E (Research & Education) backbones, which is liable to a number of inter-domain routing problems due to its particular characteristics. Through two routing cases in TEIN2 backbone, a typical R&E partial-transit...
We present an Internet-scale network topology information (NTI) service named WIND for localizing P2P traffic. Central to WIND are the two simple ideas: 1) obtaining NTI directly from routing infrastructures, and 2) leveraging existing, widely deployed DNS caches for NTI delivery. WIND fulfills the fidelity, flexibility and scalability requirement of an effective NTI service. WIND is deployed in CERNET...
IP multicast originally works in any source multicast (ASM) that comes with great burden and dynamics on the backbone routers and weakness in inter-domain scalability. It also brought serious security and management problems. In contrast, source-specific multicast (SSM) has been recognized as a simple, scalable and secure method, especially in inter-domain multicast. However, its applicability to...
Since the Internet uses destination-based packet forwarding, malicious attacks have been launched using spoofed source addresses. In an effort to enhance the Internet with IP source address validation, we prototyped an implementation of the IPv6 source address validation architecture (SAVA) and conducted the evaluation on an IPv6 test-bed. This paper reports our prototype implementation and the test...
The current Internet addressing architecture does not verify the source address of a packet received and forwarded. This causes serious security and accounting problems. Based on the drastically increased IPv6 address space, a "source address validation architecture" (SAVA) is proposed in this paper, which can guarantee that every packet received and forwarded holds an authenticated source...
Coordinates-based distance prediction algorithms can improve the performance of many Internet applications, especially in the peer-to-peer architecture and overlay construction. But some recent researches indicate that the performance gain via distance prediction based on coordinates, rather disappointed, can be significantly worse than the improvement obtained by direct measurement algorithm, and...
Packet forwarding prioritization (PFP) in routers is one of the mechanisms commonly available to network administrators. PFP can have a significant impact on the performance of applications, the accuracy of measurement tools' results and the effectiveness of network troubleshooting procedures. Despite their potential impact, no information on PFP settings is readily available to end users. In this...
As the IPv6 networks rapidly deployed, the transition problem has been changed. Because the transition of applications is a steady process with a far longer duration in comparison to the transition of infrastructure, providers cannot give up the duty of serving IPv4 traffics for the time being. On the other hand, operating a dual-stack backbone is highly costing for large-scale deployment of new networks...
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