Rockwell-automation Ethernet Design Considerations Reference Manual Manual de usuario Pagina 26

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26 Rockwell Automation Publication ENET-RM002C-EN-P - May 2013
Chapter 2 Ethernet Infrastructure Components
Media Converters
Media converters let you mix fiber and copper (twisted-pair) cables in the same
system.
Use a switch to mix media:
Physical layer devices offer no buffering or advanced diagnostic features.
Physical layer devices are easily overrun by an EtherNet/IP system (no
buffering = lost data).
Layer 2 devices have buffering, QoS, and other management features.
Bridges
A bridge is a device that isolates traffic between segments by selectively
forwarding frames to their proper destination. A bridge is transparent to the
network and protocol independent. More advanced devices that perform the
same bridging function are commonly used instead of a bridge.
Fiber Link
Ethernet
Ethernet
Ethernet
Token Ring
Bridge
Bridge
Ethernet Ethernet
Access Point
Work Group Bridge
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