Which of the following network technologies should an administrator use to replicate data between datacenters across the Pacific ocean?

CWDM (Coarse Wavelength Division Multiplexing) is an optical multiplexing technology that increases bandwidth over fiber, typically within a campus or metropolitan area, and is not a network classification for trans-oceanic distances.

VSAN (Virtual SAN) is a logical partitioning concept within a Fibre Channel Storage Area Network (SAN), designed to isolate traffic within a fabric, not a network technology for inter-datacenter connectivity over long distances.

A Metropolitan Area Network (MAN) covers a geographical area typically limited to a city or a large campus, which is insufficient for connecting datacenters across an ocean.

A Wide Area Network (WAN) is specifically engineered to connect networks and devices over large geographical areas, spanning countries, continents, or oceans. Therefore, connecting datacenters across the Pacific Ocean for data replication necessitates the use of a WAN infrastructure.