While most equipment vendors currently are SFP+ Passive DAC

The SFP + interface offers the highest density, lowest cost, and lowest power 10 Gigabit Ethernetsolution commercially available today. Further SFP + enables mass migration of the 1GbE network to10 GbE by offering a very low cost 10GSFP + Cu (direct attached copper cable assembly) option for short reach interconnects along with multimode and single mode fiber options. The SFP + interface accepts along with hot-pluggable, small-footprint, optical transceivers, a Direct Attach Cable SFP+ Passive DAC, which replaces two optical modules and a connectorized optical fiber with a twinaxial copper cable assembly.

10G SFP+ cables which all have their own special applications

 IT managers are now faced with the challenge of selecting the appropriate 10-gigabit physical media, as 10 Gigabit Ethernet (10GE) is offered in two broad categories, optical and copper, with the latter being the most commonly used means for connectivity in data centers. Dramatically reducing 10G interconnectivity costs, the 10G cables can provide inexpensive and reliable 10G speed connections using either copper cables with distances reaching up to 50ft (~15 meters length) or active optical cables reaching even 100ft. Thus, costs of local NOC links can be consistently reduced, avoiding the more costly fiber transceivers and optical cables.