This paper is motivated by the observation that gathering and analyzing
the behavior and performance of applications leads to more informed
decisions by network managers.In particular, application management
can be used to improve network trac engineering tasks. In
this paper, we investigated the existing/potential network monitoring
frameworks and showed how they can be eectively used to extract
application-level information from network applications, running environments
and the communication links. We also identied important
application-level information for network management and trac engineering,
which couldn't be easily supported by the simple network-level
monitoring information.