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The problem is caused not by either side timing out , but by both sides retransmitting the current packet when they receive a duplicate . Since we do not want to have to pay the overhead of retransmitting the full response if the cached entry is good , and we do not want to pay the overhead of an extra round trip if the cached entry is invalid , the HTTP / 1.1 protocol supports the use of conditional methods . In the case of the client timing out and retransmitting the create request , the client can use GUARDED to prevent against a sequence like : create , write , create ( retransmitted ) from occurring . Under this bill , satellite companies are no longer banned from retransmitting local network signals back into local markets , providing customers with local news , sports , and entertainment . If there is more than one buffer , it might be worthwhile retransmitting all of the buffers in WRITE requests with the stable parameter set to UNSTABLE4 and then retransmitting the COMMIT operation to flush all of the data on the server to stable storage .