https://en.wikipedia.org/wiki/List_of_interface_bit_rates
https://www.softperfect.com/contact/knowledgebase.php?article=10

Local Area Network speed:
megabit (Mb) or megabit per second (Mbps, Mb/s), with a small or lowercase ‘b’; and
megabyte (MB) or megabyte per second (MBps, MB/s), with a capital or uppercase ‘B’.

MB/s = megabytes per second
GB/s = gigabytes per second

Fast Ethernet (100BASE-X): 100 Mbit/s = 12.5MB/s
Gigabit Ethernet (1000BASE-X): 1Gbit/s = 1Gbps = 125MB/s
2.5 Gigabit Ethernet (2.5GBASE-T): 2.5Gbit/s = 2.5Gbps = 312.5MB/s
10 Gigabit Ethernet (10GBASE-X): 10Gbit/s = 10Gbps = 1.25GB/s = 1,250MB/s