Pushpendra Mohta wrote:
The argument about billing based on destination being very expensive is not entirely true. Whether on not they bill on this data, most any one planning a global IP backbone measures traffic distributions very carefully, not only for network engineering but also to understand the cost of business. The granularity required to bill on this data may have to improve -but it is not a big leap to make.
Generally speaking, it is impossible, because aggregation removes information. I.e. the better aggregation is, the harder is to pinpoint the exact location of the destination. In other words, even destination-based charging (except very special cases like ISP in the middle of nowhere connected by one wire to the rest of the world) requires cooperation of many parties, since no party has any accurate cost-of-transport information locally. --vadim