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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.
With their inclusion on the IBM PC in the early 1980s, they became an industry standard. While parallel ports gradually gained support for bidirectional transfers, USB ports started out as a medium for input and output at their debut in 1996.