Ethernet

Ethernet is a frame-based technology and bus-based broadcast network that connects devices in LANs or WANs.

802.3 Standards

The 802.3 working group defines wired network standards that share the same basic frame type and network access method.

• Each of these variants is under the IEEE 802.3 standard with same frames, each with its own identifier:

Ethernet Frames

All network technologies break data transmitted between computers into segments or datagrams, placed into packets that in turn get placed into frames.

• Using frames addresses two networking issues
• Ethernet frame parts

Early Ethernet Standards

Bus Ethernet

The original Ethernet networks was a simple bus topology, but Every version of Ethernet invented since the early 1990s uses a hybrid star-bus topology. At the center of these early networks was a hub.

10BASE-T

• Speed 10 Mbps
• Signal type Baseband
• Distance 100 meters between the hub and the node
• Node limit No more than 1024 nodes per hub
• Topology Star-bus topology: physical star, logical bus
• Cable type Cat 3 or better UTP cabling with RJ-45 connectors