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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.
IEEE Standard for Gigabit Ethernet is IEEE 802.3-2008 and the IEEE Standards for Fast Ethernet are 802.3u-1995, 802.3u-1995 and 802.3u-1995. Upgrade from simple Ethernet to Fast Ethernet is relatively simple and economical as compared to the upgrade from Fast Ethernet to Gigabit Ethernet.