Network Addresses + let's encrypt

Hello,
due to working reasons I have to be more proficient in network addresses basis and https certificates.

The network part will be useful to understand better the docker compose configuration:

** config:
- subnet: 172.16.253.0/24
gateway: 172.16.253.254**

I have the basic concepts of both arguments (network and https) but I need to understand a little bit better these topics.

Please, can you suggest in which courses and sections of the Bootcamp path these topics are covered?

Thank you in advance.