The term Ethernet refers to the family of local-area network (LAN) products covered by the IEEE 802.3 standard that defines what is commonly known as the CSMA/CD protocol. Four data rates are currently defined for operation over optical fiber and twisted-pair cables:
 
 
 - ●  10 Mbps - 10Base-T Ethernet
- ●  100 Mbps - Fast Ethernet
- ●  1,000 Mbps - Gigabit Ethernet
- ●  10,000 Mbps - 10 Gigabit Ethernet
Ethernet is currently used for approximately 85 percent of the world's LAN-connected PCs and workstations. Ethernet is the major LAN technology because of the following characteristics:
 
 
 - ●  Is easy to understand, implement, manage, and maintain
- ●  Allows low-cost network implementations
- ●  Provides extensive topological flexibility for network installation 
- ●  Guarantees successful interconnection and operation of standards-compliant products, regardless of manufacturer