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The 3% of the people, because they have been moving towards their ideal of life in a planned way, have almost all become the top successful people in the society.天启和司马二突然而来的约战，着实惊讶了很多人。板栗看看天，忙点头笑道：黑皮叔。Updated March 23哭得是沙场壮志，豪情满怀。If an attacker sends a large number of SYN requests with fake source addresses, the server side will consume a lot of resources to handle this semi-connection, and saving traversal will consume a lot of CPU time and memory, not to mention retrying SYN + ACK on IP in this list. TCP is a reliable protocol, and messages will be retransmitted at this time. The default number of retries is 5. The interval time of retries is doubled from 1s to 1s + 2s + 4s + 8s + 16s = 31s respectively. After the fifth time is sent out, it will take 32s to know that the fifth time has timed out, so the total is 31 + 32=63s.