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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.Behavioral pattern is an abstraction of dividing responsibilities and algorithms among different objects. Behavior patterns are not only about classes and objects, but also about their interactions. Behavioral patterns can be divided into two types: class behavior patterns and object behavior patterns.Compared with the taste of the new car, it is suggested that you can try it? Method:　　《大群》一剧将围绕大卫·豪勒这个角色展开，他一直在与自己的“噩梦”(寄生于其精神面中的反派变种人影王)抗争，直到遇到了梦中女孩Syd（RachelKeller饰），才决定坦然接受真实的自己。终于喊出了最低也是最内心渴望的需求。