Answer:
Crankback is a mechanism used by ATM networks when a
connection setup request is blocked because a node along a
selected path cannot accept the request. In this case, the
path is rolled back to an intermediate node, which attempts
to discover another path to the final destination
connection setup request is blocked because a node along a
selected path cannot accept the request. In this case, the
path is rolled back to an intermediate node, which attempts
to discover another path to the final destination
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