Which label is advertised by an LSR to inform neighboring LSRs to perform the penultimate hop popping operation?
A. 0x00
B. php
C. swap
D. push
E. imp-null
Which label is advertised by an LSR to inform neighboring LSRs to perform the penultimate hop popping operation?
A. 0x00
B. php
C. swap
D. push
E. imp-null