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The path of a fast reroute protected LSP is R1-R2-R3. Which of the following about the protected LSP path is TRUE?
All routers along the path, R1, R2, and R3 can be PLRs.
If the R1-R2 link fails, router R4 becomes an MP.
If the R2-R3 link fails, router R3 becomes a PLR.
Router R1 is the LSP head-end and can be a PLR.
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