Home > Storage > PowerMax and VMAX > Storage Admin > iSCSI Implementation Guide for Dell EMC Storage Arrays Running PowerMaxOS > Background
The implementation of iSCSI on many storage vendors closely follows the same model as FC and FCoE emulations where a user is presented a physical port linked together with a target node along with a pool of associated devices. Using masking, users can provision LUNs to individual hosts connected to this target. Besides LUN masking, this model provides almost no isolation and control of software and hardware resources on a per tenant basis. As a result, if a tenant required partial ownership of the IO stack, which is normally expected in cloud service environments, then each tenant would need to access its own physical port. In this type of situation, scalability immediately becomes a major obstacle with this design as front-end port counts on storage arrays are limited. Security and lack of network isolation are other concerns with this model, as resources (for example, volumes and authentication information) are shared among otherwise independent tenants.