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Author Topic: Repeater vs. Node  (Read 5094 times)
KI6BQI
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Posts: 4




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« on: December 30, 2011, 08:53:03 AM »

Can someone tell me the difference between a repeater and a node.  I understand repeater. What exactly is a node?  I looked at various internet sites for a definintion, but nothing is leading me to an adequate understanding.
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AA4PB
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« Reply #1 on: December 30, 2011, 10:04:06 AM »

A digipeater (repeater) receives a data packet and retransmits it exactly as received. The logical connection or "link" is maintained between the two end stations. If an error occurs then the packet must be retransmitted from the originator, through the digipeater, to the destination. The entire process of two transmission must be duplicated to correct the error.

A network node (node) maintains two links. One between the originator station and the node and one between the destination station and the node. The node transfers the data between the stations. The advantage is that error checking is done on each link rather than end to end. Data goes from the originator to the node. The node acknowledges to the originator then transmits the packet to the destination. The destination acknowledges to the node. If an error occurs on one link then the retransmission only occurs on that link. It is therefore much more efficient, requiring only one additional transmission to correct the error.
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