Designing Cisco Enterprise Networks (ENSLD) — Question 4

Which PIM mode uses a shared tree only?

Answer options

• A. bidirectional
• B. sparse
• C. dense
• D. source-specific

Correct answer: A

Explanation

The correct answer is A, bidirectional, as it specifically employs a shared tree for multicast traffic. The other options do not rely on a shared tree; for instance, sparse mode typically utilizes a shared tree but can also use a shortest-path tree, while dense mode employs a different mechanism altogether.