What is the maximum wire speed of a single port on a 48-port Gigabit Ethernet switch?

Wire speed of a single port on a 48-port gigabit switch would be 1 Gb/s, or 1,000 Mb/s. Theoretically, a port can transmit and receive simultaneously 1 Gb/s, but wire speed refers to a single direction. The wire speed of the entire switch (backplane) could be 48 Gb/s for a 48-port Gigabit Ethernet switch, although the backplane is usually oversubscribed on access layer switching.