Which of the following statement about guaranteed restriction (GR) in generalized Multiprotocol labelSwitching (GMPLS) is...

GR use reestablished backup LSPs with resources reserved and configured.

GR can achieve 100% survivability for a single-failure scenario only.

GR does not required the signaling of the fault to trigger the restoration.

GR calculates a new backup LSP every time a failure occurs.