5: DataLink Layer 5-1 Interconnecting with hubs Backbone hub interconnects LAN segments Extends max distance between nodes Multi-tier design provides a degree of graceful degradation. Can’t interconnect 10BaseT & 100BaseT Hub is essentially a repeater that does not buffer frames. hu b hub hub hub
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5: DataLink Layer5-1 Interconnecting with hubs r Backbone hub interconnects LAN segments r Extends max distance between nodes r Multi-tier design provides.
5: DataLink Layer5-3 Switch r Link layer device m stores and forwards Ethernet frames m examines frame header and forwards frame based on MAC dest address m when frame is to be forwarded on segment, uses CSMA/CD to access segment r transparent m hosts are unaware of presence of switches r plug-and-play, self-learning m switches do not need to be configured
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5: DataLink Layer 5-1
Interconnecting with hubs Backbone hub interconnects LAN segments Extends max distance between nodes Multi-tier design provides a degree of graceful