????:1???????:?????

2????????????

3?????

4???????

5???????????

12????????21??????,??????,????“?”?“??????????????????”???IP???“??????”,???????????,????????,???? ??? ?????? 12????????21????,??????????,?“?????”?????“??????”????????????IP??????“?”,??????????????????,?????,????????????????????? ?? ?????? 12???21??????,???????????????????????,??“?”????“?”??????IP?“????”,??????????????????,?,??? ??? ????? 12?????21?,??????????,????????????????????“?”?????“????????”?????IP?????“??”,?????????????????,??????,?????? ?????? ??? 12?????21??????,?,???????,??????????????????“??????”?????“?”?IP????“???”,?????,????,?????????????? ? ?? ???????????:?????