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What is the difference between a source tree and a shared tree in a multicast environment?
To route traffic from source to receiver a source tree uses a link-state routing protocol and a shared tree uses a distance-vector routing protocol.
A source tree has its root at the source, and a shared tree has its root at a designated rendezvous point.
To stream multicast from source to receiver, a source tree uses PIM-SM and a shared tree uses PIM-DM.
Source trees are the default type for bidirectional PIM. and PIM-DM uses shared trees by default.
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