Difference between Line type and Table type

Hi Experts,

I have gone throw the posts related to Line type and Table type , Finally i understood that

If a Line type is created in SE11, and if i want to use it in SE38 , Then it will declared as below

itab type table of zlinetype

wa type line of zlinetype.

If i want to define a internal table in SE38 using Table type only, Then will define as below

types : begin of itab,

            kunnr type kna1-kunnr,

            name1 type kna1-name1,

     end of itab.

Data :  itab_type type table of itab.

            wa_type type itab.

then this type of declaration is called Table type  .

Please clear my doubt. Is this correct ?