5G can be deployed in five different deployment options. NSA options consist of two generations of radio access technologies (4G LTE and 5G). Non-standalone option 3 is where the radio access network is composed of eNBs (eNode Bs) as the master node and gNBs (gNode Bs) as the secondary node (see the left side of Figure 2). The radio access network is connected to EPC (Evolved Packet Core). This is where 5G base stations are integrated with an existing 4G network working in tandem with LTE base stations and connected to the LTE Core, relying on the measures and protections that the LTE core provides.