What are some of the major architectural differences exist between 3G and 4G?

Question: What are some of the major architectural differences exist between 3G and 4G?

1.The RNC acts as a BS in a cluster-type RAN configuration.

2.The circuit-switching elements are removed in 4G.

3.A VOIP Gateway is used to connect to the PSTN and ISDN networks

4.All of the above


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