Download dbeaver community edition (free version) from https://dbeaver.io/download.
Provide your public IP address to TalentTEK instructors. You can get your ip address from https://www.ipchicken.com/
Once you TalentTEK Instructors or admin whitelist your IP address, you should be able to successfully connected to TalentTEK Traning Center Database for Backend Testing.