Editing Channel access method (section)

===Local and metropolitan area networks===
In [[local area network]]s (LANs) and [[metropolitan area network]]s (MANs), multiple access methods enable bus networks, ring networks, star networks, wireless networks and half-duplex point-to-point communication, but are not required in full-duplex point-to-point serial lines between network switches and routers. The most common multiple access method is CSMA/CD, which is used in [[Ethernet]]. Although today's Ethernet installations use full-duplex connections directly to [[Ethernet switch|switches]]. CSMA/CD is still implemented to achieve compatibility with older [[repeater hub]]s.