# 1. Working with Network

## <mark style="color:green;">Overview</mark>

HI GIO uses a layered networking architecture with four categories of networks to provide a highly flexible and secure network infrastructure in a multipurpose cloud environment. The categories are external networks, organization virtual data center (VDC) networks, data center group networks, and vApp networks. Most types of networks require additional infrastructure objects, such as edge gateways and network pools.


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