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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.
The 802.3ba 40G/100G Ethernet standard was ratified in June 2010. The standard provides guidance for 40G/100G data transmission using single-mode and multi-mode fiber-optic cables. Single-mode: This classification allows one light-transmission to propagate.