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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.
Gigabit Ethernet provides speeds of 1000 Mbps (1 gigabit or 1 billion bits per second) and 10 GbE, or 10-Gigabit Ethernet, provides up to 10 Gbps, and so on. Higher speeds are constantly under development for standardization.