Click is a modular router toolkit. To use it you ll need to know how to
compile and install the software, how to write router configurations, and
how to write new elements. Our ACM Transactions on Computer Systems paper,
available from the Web site, will give you a feeling for what Click can
do. Using the optimization tools under CLICKDIR/tools, you can get even
better performance than that paper describes.
Radio frequency identification (RFID) and Wireless sensor networks (WSN) are
the two key wireless technologies that have diversified applications in the present
and the upcoming systems in this area. RFID is a wireless automated recognition
technology which is primarily used to recognize objects or to follow their posi-
tion without providing any sign about the physical form of the substance. On the
other hand, WSN not only offers information about the state of the substance
and environment but also enables multi-hop wireless communications.
