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Review Questons 1. The original commercial version of Ethernet supported 10 Mbps bandwidth; the version introduced in the early 1990s supports 100 Mbps; and in 1998, Gigabit Ethernet was introduced. All versions use the same data frame formats, with the same maximum PDU sizes, so they can interoperate freely.
These numbers scale up/down precisely according to speed. The original 10-mbps Ethernet from the 1980s had a maximum rate of 14,880 packets/second. Today's 10-Gbps Ethernet has a maximum rate of 14,880,952 packets/second.