How is redhatlinux9.0 mounted on a virtual machine connected to the Internet?

How is redhatlinux9.0 mounted on a virtual machine connected to the Internet? -- Linux general technology-Linux technology and application information. For details, refer to the following section. I installed the red hat 9.0 system on the machine using the virtual machine. My machine is connected to the network (not a wireless network, but a machine in the company. I don't know how to connect it, it should be Dial-Up). I see in my network neighbors that virtual machines are also connected to the network, but I cannot access the network when I enter red hat linux 9.0. Why ?? What is the relationship between virtual machines and system networking ?? How can I connect to the Internet ?? Thank you for your help!