Ask a question by posting it as a discussion. There might be another person who has the answer to your question and can post a reply. You can mark a discussion post specifically as a question when you create the post. (Posts are marked as questions by default. If you don't initially mark the discussion as a question (or if you did but you didn't mean to), you have 15 minutes to change your mind. Within that time, you'll see a link in the discussion post.)
To post a question, click New > Discussion*, then click *Create New Discussion*. Select a community from the drop down menu, if you are not already in a specific community area. Under *Post New Thread*, after titling and describing your question, be sure to verify that *Mark this thread as a question check box is checked before clicking *Post Message*.