Firewalls are core elements in network security. However, managing firewall rules,
particularly, in multifirewall enterprise networks, has become a complex and error-prone …

We address the problem of deciding whether there exists a consistent estimator of a given
relation Q, when data are missing not at random. We employ a formal representation …

In network performance tomography, characteristics of the network interior, such as link loss
and packet latency, are inferred from correlated end-to-end measurements. Most work to …

In this paper, we develop failure-resilient techniques for monitoring link delays and faults in
a service provider or enterprise IP network. Our two-phased approach attempts to minimize …

Overlay network monitoring enables distributed Internet applications to detect and recover
from path outages and periods of degraded performance within seconds. For an overlay …

Conventional wisdom has been that the performance limitations in the current Internet lie at
the edges of the network--ie last mile connectivity to users, or access links of stub ASes. As …

Traceroute is the most widely used Internet diagnostic tool today. Network operators use it to
help identify routing failures, poor performance, and router misconfigurations. Researchers …

Network measurement and monitoring have been key to understanding the inner workings
of computer networks and debugging the performance problems of distributed applications …

In this paper, motivated by network inference and tomography applications, we study the
problem of compressive sensing for sparse signal vectors over graphs. In particular, we are …

The statistical problem for network tomography is to infer the distribution of X, with mutually
independent components, from a measurement model Y= AX, where A is a given binary …