c - What is the identifier of typedef struct -

I came to learn the linked list. But, I am quite confused in many ways to declare linked lists with struct.

This is a method, typingff structure noodt {int dataNum; Struct notepad * nextNode; } NODE;

And this is another way type is not typed

  struct NODE {int dataNum; Struct NODE * nextNode; };   
 I'm curious, when we are announcing with  typedef , I know that  notettext  to know the compiler Used for the  straight notetag * next node; . But then, what is the real identifier of  struct ?  Notetag  or  NODE ? If this is  notettext , then when is  NODE ?  
  
 
 
 You can alternatively assign a tag to a structure, such as  struct nodetag < / Code> or  struct NODE . These tags (and union tags, and em tags) are in namespace separate from the common identifier.  
  creates a nickname for typed f  version  struct nodetag :  
  typed node tag { ...} NODE;   
 Now the common identifier is a type of name in the namespace, which is synonym or surname for  struct nodetag . > 
 Note that you can also write:  
  typedef struct noettag NODE; Structure Knowtag {Int dataNum; Node * Agnolode; };   
 The first row says that 'Tag'  notetag  and  NODE  are the nickname for this type with a composition type exists' second The block says that  struct nodetag  belongs to these items, lists a  NODE *  as one of the members.  
 
 C and C ++ are two different languages ​​ 
 Note that this question has been tagged, and you are receiving direct answer ( Which is good). However, if you have to face C ++, then you feel that:  
  struct nodetag {int dataNum; Notatag * Agalanod; };   
 is valid C ++ and the common identifier namespace (plus the structure in the tag  notetag ) tag namespace. It is not valid in C. If you end up using the C ++ compiler to compile the C code, you may get confused.