Clarification related Oracle Client and sqlplus

Mindcontrol-Oracle

Hi Team,

I need to connect to a REMOTE Oracle 19c database server from VDI through Oracle Client or SQL*PLUS.

I only have the Database Name "Orcl" and the TNS Connect string "dev1".

1. Please advise what are all the pre-requisites that I need to have in my VDI, so I can connect to the remote DB.
2. What are the environmental variable I need to set in my VDI ?
3. Do I need to have Oracle client installed in my machine ? which version of Oracle client ?
4. If I have Oracle 12c client in my machine, will I be able to connect to Oracle 19C DB.

Best Regards.