. A response was not received before the timeout perid expired ! A response was received within the timeout period U A remote router responded that the destination is unreachable N A remote router responded that the network is unreachable P A remote device responded that the protocol is not supported Q Source quench, telling the source to slow its output M The ping packet needed to be fragmented, but a remote router couldn't perform fragmentation A The ping packet was filtered by a device ? The ping packet type is not understood by a remote device & The ping exceeded the maximum number of hops supported by the routing protocol. 沒有你說的L S --

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