How to determine the necessary IP address to create a virtual network?

Question

Computer networks

Good day!

There is a task for me, a completely newbie in networks. Deploy a VM using VMware and create 2 domain controllers based on Windows Server 2016 on it. Here a snag awaited me, I absolutely do not understand where and how I should take the IP address for two virtual machines to make 2 domain controllers out of them...
The task itself looks like this (this is me to understand why two CDs are needed):
1. Deploy 2 Domain Controller;
2. Configure Active Directory;
3. Deploy 1 vClient;
4. Collect and configure vClient;
5. Deploy and configure Zabbix monitoring
6. Deploy 3 mail servers;
7. Need to deploy regular Windows 7 Pro;
8. Set up sending alerts from the zabbix server through your mail system.

Please help me to understand the fool

Answer 1

Come up with and choose from a range of local addresses, it is also advisable to look at the network settings of your virtualization

Answer 2

I absolutely do not understand where and how I should take the IP address for two virtual machines

There are two options here -

1. Get from DHCP server.
   
2. Invent yourself.