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The other two schemes are based on SYN cache and SYN? Cookies (see 6.4), simplifies the state initialized when the TCB is generated by receiving the SYN, and delays the instantiation of the full state [4]. In hosts that use SYN caching, a HASH tablespace with a limited size is used to store a subset of data that will be allocated to the TCB. If the ACK is received when the handshake is completed, the data will be copied into a complete TCB, otherwise HASH values exceeding the lifetime will be recycled when needed. In Lemon's FreeBSD, the SYN cache is 160 bytes for a half-open connection, while a full TCB is 736 bytes and supports 15,359 SYN cache spaces.哼，坏蛋，想试她，门都没有。Note: 1 = Excellent 2 = Good 3 = SatisfiedFor accelerated taxiing before takeoff, pressing the PAGE UP key will accelerate (just press it), whereas PAGE DOWN will slow down.　　伟先生竟然答应了。伟先生还送给艾夫人一罐虾酱，还对其言语讽刺一番。伟先生要走之前，和朋达说了很多心里话。First, let's review the rules for what iptables are.