This image shows the Networking section of the Create compute instance page.

There is text at the top "A virtual network interface card (VNIC) (link) connects your instance to a virtual cloud network (VCN) (link) and endpoints in and outside the VCN. Having a public IP address is required to make this instance accessible from the internet."

Under Primary VNIC there is a VNIC name text field with sample text.

Under Primary network there are three options:
--Select existing virtual cloud network (selected)
--Create new virtual cloud network
--Specify OCID

There are drop-down lists showing sample text for:
--Virtual cloud network compartment
--Virtual cloud network 

Under Subnet there are options for Select existing subnet (selected) and Create new public subnet.

There are drop-down lists showing sample text for:
--Subnet compartment
--Subnet