One example of virtual miniport driver usage is to add virtual NICs, each with a different Virtual LAN.
Examples of configuration changes that one can do from a managed switch include: enable features such as Spanning Tree Protocol, set port bandwidth, create or modify Virtual LANs (VLANs), etc.
Although it was possible to use IP routing to connect multiple Ethernet networks together, the VAX-11/780 computers commonly used as routers cost $400,000 each at that time, and their total throughput was significantly less than Ethernet speeds.
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After successful experiments with Voice over Ethernet from 1981 to 1984, Dr. W. David Sincoskie joined Bellcore and began addressing the problem of scaling up Ethernet networks.
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