|
The second scenario is only slightly different from scenario 1. Suppose that the FTP user has purchsed "platinum"
(high-priced) Internet access from its ISP, while the audio user has purchsed cheap (low-budget) Internet service that costs
only a minuscule fraction of platinum service. Should the cheap user's audio packets be given priority over FTP packets
in this cast? No, in this case, it would seem more reasonable to distinguish packets on the basis of the sender's IP
address. It is necessary for a router to classify packets according to some criteria. This then calls for a slight modification
to principle 1.
Principle 1 (modified): Packets classification allows a router to distinguish among packets belonging to
different classes of traffic.
|
