Emotional Health = the ability to express your emotions appropriately for your age
Mental Health = the ability to manage your actions stemmed from your emotions (the ability to engage the appropriate reaction to situations)
So emotional health is more about your actual emotions and mental health is more about what you do with those emotions. However, they are both similar in the fact that they both deal with emotions.
We can setup a standalone network for a computer Laboratory. The requirements are computers, network cables, switch, softwares and IP addresses. Computer engineers can configure these computers with defined users access and restrictions. We can run only the required applications intended for this purpose. We can also define rules and policy in the computer Lab where we can restrict unnecessary sites.