Learn More
The Internet faces well-known challenges in realizing modifications to the core architecture. To help overcome these limitations, virtual networks run over physical networks and use Internet paths and protocols as essentially a link layer in the virtual network. Effective use of the underlying network requires intelligent placement of virtual networks so(More)
Information-Centric Networking (ICN) architectures aim to replace current host-centric IP architecture with an information-centric one for efficient, secure, and reliable dissemination of information. ICN is built on several salient principles such as publish and subscribe paradigm, named content, innetwork caching, and security over atomic information(More)
Network virtualization enables the deployment of novel network architectures and services on existing Internet infrastructure. In addition, virtual networks (VNs) can share the resources in the physical substrate. To enable efficient resource reallocation and network agility, VNs must sometimes migrate, i.e., change their placements on a substrate network.(More)
DDoS attacks have been a persistent threat to network availability for many years. Most of the existing mitigation techniques attempt to protect against DDoS by filtering out attack traffic. However, as critical network resources are usually static, adversaries are able to bypass filtering by sending stealthy low traffic from large number of bots that mimic(More)
Monitoring end-to-end paths in an overlay network is essential for evaluating end-system performance and for troubleshooting anomalous behavior. However, conducting measurements between all pairs of overlay nodes can be cumbersome and expensive, especially in a large network. In this paper, we take a different approach and explore an additional degree of(More)
We present an active measurement study of the routing dynamics induced by AS-path prepending, a common method for controlling the inbound traffic of a multi-homed ISP. Unlike other inter-domain inbound traffic engineering methods, AS-path prepending not only provides network resilience but does not increase routing table size. Unfortunately, ISPs often(More)
A virtual network (VN) contains a collection of virtual nodes and links assigned to underlying physical resources in a network substrate. VN migration is the process of remapping a VNs logical topology to a new set of physical resources to provide failure recovery, energy savings, or defense against attack. Providing VN migration that is transparent to(More)
To my parents, for their endless love and support To my wife and my little son iii ACKNOWLEDGEMENTS After spending ten years on research and six years in the PhD program at Georgia Tech, I finally arrive at the end of my long journey in obtaining my degree in computer science. It was the help and support from many people that kept me going through all the(More)
  • 1