3G network consists of the followings Network Elements…a.RNCb.S-GWc.HSSd.P-GW

The 3G network, also known as UMTS (Universal Mobile Telecommunications System), consists of several network elements. However, the elements you mentioned are not all part of the 3G network. Here's a breakdown:

a. RNC (Radio Network Controller): This is indeed a part of the 3G network. The RNC is responsible for controlling the Node Bs that are connected to it.

b. S-GW (Serving Gateway): This is not a part of the 3G network. The S-GW is a component of the 4G network, also known as LTE (Long Term Evolution). It routes and forwards user data packets.

c. HSS (Home Subscriber Server): This is not a part of the 3G network. The HSS is a component of the 4G network. It contains the subscription-related information to support the network entities actually handling calls/sessions.

d. P-GW (PDN Gateway): This is not a part of the 3G network. The P-GW is a component of the 4G network. It represents the user's connection to the external packet data networks and is responsible for IP address allocation and other IP-level services.

So, out of the elements you mentioned, only the RNC is a part of the 3G network. Other elements of the 3G network include the Node B (the base station), the MSC (Mobile Switching Center), and the SGSN (Serving GPRS Support Node), among others.