What is the maximum data transfer rate of Gigabit Ethernet ?

Gigabit Ethernet is a family of computer networking technologies for local area networks (LANs) that transmit data at a rate of 1 gigabit per second (Gbps). The term 'Gigabit' explicitly refers to this speed, making 1 Gbps the standard maximum data transfer rate for this technology. This is a significant upgrade from Fast Ethernet, which operates at 100 Mbps (Option A), and is slower than 10 Gigabit Ethernet, which supports speeds up to 10 Gbps (Option C). Option D, representing 1 Tbps, is far beyond current standard Ethernet capabilities for typical LAN environments. Therefore, the correct answer is Option B (1 Gbps), as it directly aligns with the definition and standard specification of Gigabit Ethernet.