A computer network is comprised of nodes corresponding to network elements such as workstations,routers and switches and links that connect those elements. A network now contains all the traffic originating at a node and destined for some other node in the network. Each how can in principle traverse a set of paths connecting its origin and destination, which is determined by the routing policy.
In computer networks, the low traffic is carried on packets, whose payload is expressed in bytes, while on road networks, the traffic is carried on vehicles. The volume of traffic measured on a link may refer to either the number of packets and/or the number of bytes in computer networks, and such data for a particular time interval -typically of the order of a couple of minutes- are available through queries using the Simple Network Management Protocol (SNMP) protocol.
The volume of traffic on a 1link is the sum of volumes of all rows traversing that link. This produces highly aggregate data and the question of interest is to estimate various statistics of the underlying network.
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