Transmission packets – Rockwell Automation Ethernet Design Considerations Reference Manual User Manual
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Rockwell Automation Publication ENET-RM002C-EN-P - May 2013
Chapter 3
Ethernet Infrastructure Features
Transmission Packets
Data is transmitted over the EtherNet/IP network in packets. There are
transmission methods for transporting data on the network.
Packet Type
Destination
Description
Unicast
A single node
Unicast connections are point-to-point transmissions between a source node and destination node on the network.
A frame is sent to a single destination.
Multicast
Multiple nodes
simultaneously
Multicast connections deliver information from one sender to multiple receivers simultaneously.
Copies of a single frame are passed to a selected subset of possible destinations.
Broadcast
All nodes
Broadcast connections transmit information to every device on the network.
A frame is delivered to all hosts on the network.
1756 Controller
Stratix Switch
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