An example on aggregate bandwidth calculation
We have two networks, both with 16 nodes and the message size of 125 bytes.
One (C) is using coaxial cables and the other (F) - fiber optics.
C: A shared-medium network, with a single cable whose bandwidth 10 Mb/sec.
The average length of the cable between two nodes is 500 meters.
F: A switched network with one switch. The bandwidth of the cables is 100 Mb/sec.
The average length of the cable between a node and the switch is 50 meters.
The switch can support full bandwidth. It adds 50 microseconds to the time of flight.
What is the aggregate bandwidth?
Because it uses a single cable, and the aggregate bandwidth is the same as the
For F this is 8 ?100Mb/sec = 800 Mb/sec.
Because the network can act like as it had 8 parallel cables, connecting 8 pairs of nodes.
- the maximum number of (raw) bytes the network can
transfer per time unit, no matter between which nodes.