well, One major advantage of these boxes is that they can be used in more than one way. In passive mode, they can analyze and classify the traffic that's flowing on a subnet (this can be useful in such activities as doing network planning or resolving performance issues, for example). But when used in active mode, the boxes can also "shape" or control the traffic that flows over the network.
Without intentional traffic shaping, network traffic will flow subject only to natural limitations , or "choke points." Those choke points can occur at a very low level (e.g., at the TCP/IP protocol level), in the way an application happens to be programmed, in the host system on which an application may be running, or in the network itself. If you are dialing in, for example, your traffic will be choked by the 40 to 50Kbps of effective throughput your modem may deliver.
In the case of a directly connected system on campus, most often the only binding constraint will be the university's wide area (Internet) bandwidth, which we all collectively share. This type of bandwidth is in high demand on campus, but because it's expensive to purchase and budgets are tight, the university must manage its limited bandwidth wisely.
Answered by
Romi
, an ibibo Master,
at
1:34 PM on September 03, 2008