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Understandable! However I was under the impression that the hosts of a segment would be constantly broadcasting among them even if not much is actually "user generated traffic". Do I have the wrong impression?
Whether their traffic is all or even mostly broadcast depends
entirely on what they're doing. If something's spewing broadcast video or disk images etc. to the network you'll obviously have a lot of broadcast. If you've got a hundred people running web browsers the traffic will be almost all non-broadcast. (Yes, there will be
little bits of broadcast all the time, ARP requests and DHCP traffic and service announcements and all that, but these shouldn't amount to much.) Lacking my crystal ball, I really can't say whether you can put that many hosts on a subnet for what they're doing.
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Nevertheless, I wish to not miss the opportunity to ask you: by what rules could I come to the conclusion that the network is heavy on traffic?
The amount of available bandwidth versus the amount of used bandwidth, both between hosts and upstream/downstream.