The Dell 2JVDD is a direct-attach cable for connecting network equipment with SFP28 interfaces. Dell lists it for 25GbE links, making it suited to short connections between compatible ports in a network setup.
This version is a 1-metre passive copper twinax cable with SFP28 connectors at both ends. Its direct-attach format brings the two interfaces together over a short cable run, without adding unsupported claims about compatibility with particular devices.
Dell lists 2JVDD as the 1-metre option and distinguishes it from its 2-metre cable variant. This description refers specifically to the 1-metre 2JVDD cable.