A local-area network (LAN) is a computer network that spans a relatively small area. Most LANs are confined to a single building or group of buildings, however, one LAN can be connected to other LANs over any distance via telephone lines and radio waves.

It usually covers the following topics -

• Ethernet History
• Ethernet Types 10 or 100 or 1000 Base T TX SX or LX
• 10BASE2 and 10BASE5
• Repeaters
• 10BASE T with Hubs
• UTP Cabling UTP Cables and RJ 45 Connectors
• UTP Cabling Pin outs
• CSMA or CD
• Using Switches and Their Advantages
• Ethernet Data Link Protocols and Frame
• Wiring Ethernet Cables
• Ethernet Addressing Framing and Error Detection
• LAN Types Ethernet Token Ring FDDI