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by int0x2e
1654 days ago
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While I don't disagree, if people at the time had assumed that everyone on the network could be trusted (forever), why design the IPv4 address space to make room for 4 billion devices? Why support so many ports and concurrent connections? The two assumptions don't quite match up. |
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Because when TCP and it's predecessors were invented there were only a few computers in entire world. In initial ARPAnet there were only 4 hosts (In September 1973 there were 42 computers connected to 36 nodes)
But each computer had many users. That's why there were so many ports, because the thinking was there will be big computers with many users each running their own internet connected clients and servers.
That was true even in the beginning of 1990's, when I want to high school, I had access to Unix shared between 2000+ people.