  Majorana bound states (MBS) at the end of nanowires have been proposed as one
of the most important candidate for the topological qubits. However, similar
tunneling conductance features for both the MBS and Andreev bound states (ABS)
have turned out to be a major obstacle in the verification of the presence of
MBS in semiconductor-superconductor heterostructures. In this article, we use a
protocol to probe properties specific to the MBS and use it to distinguish the
topological zero-bias peak (ZBP) from a trivial one. For a scenario involving
quantized ZBP in the nanowire, we propose a scheme wherein the length of the
topological region in the wire is altered. The tunneling conductance signatures
can then be utilized to gauge the impact on the energy of the low-energy
states. We show that the topological and trivial ZBP behave differently under
our protocol, in particular, the topological ZBP remains robust at zero bias
throughout the protocol, while the trivial ZBP splits into two peaks at finite
bias. This protocol probes the protection of near zero energy states due to
their separable nature, allowing us to distinguish between topological and
trivial ZBP.
