H12-821_V1.0 · Question #131
The shortest path from the multicast source to the receiver is called the shortest path tree SPT.
The correct answer is A. TRUE. Option A (TRUE) is correct because in multicast routing, the Shortest Path Tree (SPT) is indeed defined as the optimal path tree rooted at the multicast source, where each branch represents the shortest (lowest-cost) path from the source to each receiver in the multicast group…
Question
Options
- ATRUE
- BFALSE
How the community answered
(30 responses)- A77% (23)
- B23% (7)
Explanation
Option A (TRUE) is correct because in multicast routing, the Shortest Path Tree (SPT) is indeed defined as the optimal path tree rooted at the multicast source, where each branch represents the shortest (lowest-cost) path from the source to each receiver in the multicast group.
Option B is wrong because there is no ambiguity here - SPT is a well-established term in multicast routing protocols (like PIM-SM when switching from the shared tree) that specifically refers to source-rooted shortest paths, making the statement definitively true, not false.
Memory tip: Think of SPT as a tree "sprouting" from the Source - the S in SPT stands for both Shortest and Source, reminding you that it's always source-rooted and always takes the minimum-cost path to each receiver.
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