Confusion between table border and colspan.

Question

can anyone tell me, why table border and colspan both same size/ number ???

Answer 1

border="2px"
means draw border to table 1pixel thick

colspan="2"
means merge 2 cell.

Answer 2

table border is used for,well, table border :D.
Colspan is used to merge cells.

Answer 3

Now I got it
rowspan="n" for merging n number of rows. and
colspan="n" for merging n number of columns