Usually used tp-link wireless network suddenly showed “limited or no connectivity”, …

Gateway / IP is no access to IP addresses, you can manually specify 1.did not understand
(1) This Others are sealed in the router, your MAC address, you should think of ways to restart the router, it can be solved
(2) telecommunications network has been broken in the attacks and some you just can not operate unless they view your network Fee does not expire under the resumption of your router.