The NVOCC (Non-Vessel Operating Common Carrier) and MTO (Multimodal Transport Operator) are both intermediaries in shipping, but differ in scope.
An NVOCC focuses on ocean freight, acting like a carrier by booking space in bulk on ships and reselling it, issuing its own Bills of Lading (B/L) for ocean leg.
NVOCC bears the ocean freight which is in liner terms: the Shipping carrier handles and pays for both loading and the origin ports (here the carrier refers to NVOCC duties and responsibilities).