Learn More
Border Gateway Protocol (BGP) plays a critical role in the Internet inter-domain routing reliability. Invalid routes generated by mis-configurations or forged by malicious attacks may hijack the traffic and devastate the Internet routing system, but it is unlikely that a secure BGP can be deployed in the near future to completely prevent them. Although many(More)
BACKGROUND AND AIM Helicobacter pylori infection remains common in East Asia, though its prevalence is decreasing in Western countries. H. pylori-related atrophic gastritis (AG) may reduce the likelihood of gastroesophageal reflux disease (GERD). We investigated the prevalence of H. pylori infection and AG and their association with endoscopic findings and(More)
BACKGROUND Data regarding the use of corticosteroids for the prevention of post-endoscopic retrograde cholangiopancreatography (ERCP) pancreatitis are conflicting. The aim of this meta-analysis was to compare corticosteroids with placebo for prevention of post-ERCP pancreatitis. METHODS Multiple databases including MEDLINE, EMBASE, Cochrane controlled(More)
OBJECTIVES Complications of peptic ulcer disease (PUD) are common in China. Population-based estimates of the prevalence of PUD are needed to quantify and characterize the population at risk of these complications. METHODS As part of a large epidemiological study, 3,600 randomly selected residents of Shanghai (aged 18-80 years) were asked to undergo(More)
The inter-domain routing protocol, Border Gateway Protocol (BGP), plays a critical role in the reliability of the Internet routing system, but forged routes generated by malicious attacks or mis-configurations may devastate the system. The security problem of BGP has attracted considerable attention, and although several solutions have been proposed, none(More)
Due to the significant increase of peer-to-peer (P2P) traffic in the past few years, more attentions are put on designing effective methodologies of monitoring and identifying P2P traffic. In this paper, we propose a novel approach to measure and discover the special characteristics of P2P applications, the periodic behaviors, from the packet traces. We(More)
The critical requirement on reliability, fault-tolerance and security of network devices highlights the necessity of protocol robustness testing. Mutation testing of protocol messages is an important part of robustness testing, but related theory and practices are not well developed. This paper builds a NFSM model for mutation testing of protocol messages(More)
Traffic engineering under OSPF routes along the shortest paths, which may cause network congestion. Software Defined Networking (SDN) is an emerging network architecture which exerts a separation between the control plane and the data plane. The SDN controller can centrally control the network state through modifying the flow tables maintained by routers.(More)
VoIP (voice over IP) traffic generation has significant meaning for the measurement of VoIP quality in networks, but existing generation methods are insufficient both in reality and interactivity, and thus affect the accuracy of VoIP quality measurement. This paper proposes a conversational model based VoIP traffic generation algorithm, which simulates the(More)