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In this paper, we firstly create developer networks by affiliation between projects and developers, and then, with respect to social network analysis, take an approach to empirically study the new developers' behavior and the relationship with the centrality measures. We find that most of new developers choose to cooperate with each other initially, but more collaboration are established between new...
The mechanism of SQL injection attack is introduced in this paper. Differing from the works of the predecessors, the authors categorize the injection attacks according to the characteristics of the injection codes. For the type of web databases with SQL Server as the backend, a DDL (Detection-Defense-Log) Model against SQL injection is created. Both the client computer and the server are included...
Programmable routers supporting virtualization are a key building block for bridging the gap between new Internet protocols and their deployment in real operational networks. This article presents the design and implementation of PEARL, a programmable virtual router platform with relatively high performance. It offers high flexibility by allowing users to control the configuration of both hardware...
We propose a novel Internet Exchange (IX) architecture, namely OSN-IX, which adopts an overlaid-star network (OSN) as an IX. OSN can be considered as a "distributed" switch, which combines the advantages of the network and switch. Compared to other IX architectures, e.g., LAN-based IX, MPLS IX, Photonic IX, etc., OSN-IX has good properties of scalability, resilience, and widely distributed...
Time synchronization is one of core technologies in distributed systems and communication fields. The "Network Time Protocol" (NTP) is the current widely accepted standard for synchronizing clocks over the Internet. NTP uses a hierarchical scheme in order to synchronize the clocks in the network. It mainly adopts a phase-locked loop technique to adjust the local clock. This paper develops...
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