Services: Getting error 406 Node type is required - but I have specified the node type
try to observe the order of fields like: type > title > body > fields
that is the widget type of "field_link"?
add "und" to this field

{"title":"Sample post ",
"type":"article",
"body":{
"und":[{
"value":"comments about something"}]},
"field_link":{
"und":[{
"url":"http://www.google.com",
"title":"My title"}]}}