During node protection signaling, the PLR knows the address of the MP from which of the following methods?
The PLR issues a RSVP path message to the destination router to request the address of the MP.
The PLR learns the address of the MP from the ERO.
The PLR learns the address of the MP from the RRO
The PLR learns the address of the MP from the targeted RSVP hello message.
The PLR does not need to know the address of the MP.
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