In Talk 2.x you can:
inserting links to Confluence and external pages to comments
inserting links to page attachments
To insert a link to a Confluence page, do the following:
To insert a link to an external page, do one of the following:
You can add links to all types of file attachments supported by Confluence by dropping them in a comment. File is automatically attached to the current page and the link to it appears in the comment as show below: