Definition: In computer networking, a kilobit normally represents 1000 bits of data. A megabit represents 1000 kilobits and a gigabit represents 1000 megabits (equal to one million kilobits).
Kilobits, megabits and gigabits traveling over a computer network are typically measured per second. One kilobit per second equals 1 Kbps or kbps (these are equivalent), one megabit 1 Mbps, and one gigabit 1 Gbps. Slow network connections such as modem links are measured in kilobits, faster links such as WiFi wireless in megabits, and very fast connections like high-speed Ethernet in gigabits.
Definition: Gigabit Ethernet is an extension to the family of Ethernet computer networking and communication standards. The Gigabit Ethernet standard supports a theoretical maximum data rate of 1 Gbps (1000 Mbps).