Summary Points
Although LANs originally were truly local, today a LAN can span acampus or can include multiple sites.
A LAN operates at the physical and data link layers.
Cables, communicating computers, repeaters/hubs, and bridges/switches all are LAN components.
An Ethernet collision domain is made up of end systems, cable segments, repeaters, and hubs. Only one frame can be in transit across a collision domain at any given time.
The Ethernet Carrier Sense Multiple Access with Collision Detection (CSMA/CD) media access protocol is used on a collision domain. CSMA/CD also is called half-duplex Ethernet communication.
Bridges and switches increase a LAN's transmission capacity by breaking an Ethernet LAN into multiple collision domains.
The change ...
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