Recently, I asked this question: https://superuser.com/questions/709739/what-is-a-name-of-this-port-and-for-what-purpose-can-be-used

I also provided a picture and its the best thing to tell what I am asking about. However, the question marked as off-topic.

I am really confused because I can't edit the question content to make it on topic, can you please help me in this context.

Thanks