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Through the management of the connection pool, the sharing of database connections is realized, and the connection does not need to be recreated every time, thus saving the overhead of database recreation and improving the performance of the system!SYN attack is a kind of DOS attack. It takes advantage of TCP protocol defects and consumes CPU and memory resources by sending a large number of semi-connection requests. SYN attacks can not only affect hosts, but also harm network systems such as routers and firewalls. In fact, SYN attacks can be implemented as long as these systems turn on TCP services no matter what systems are targeted. As can be seen from the above figure, the server receives the connection request (syn=j), adds this information to the unconnected queue, and sends the request packet to the client (syn=k, ack=j+1), then enters the SYN_RECV state. When the server does not receive an acknowledgement packet from the client, it retransmits the request packet and does not delete this entry from the non-connection queue until the timeout. With IP spoofing, SYN attacks can achieve good results, Typically, clients forge a large number of non-existent IP addresses in a short period of time, SYN packets are continuously sent to the server, and the server replies to the confirmation packets and waits for the confirmation of the customer. Since the source address does not exist, the server needs to continuously resend until it timeout. These forged SYN packets will occupy the unconnected queue for a long time, normal SYN requests will be discarded, the target system will run slowly, and in serious cases, the network will be blocked or even the system will be paralyzed.2417由泰国抖音和泰国明星猎人Starhunter娱乐 合作三部剧不同的系列剧举行开机拜神仪式，三部系列剧分别是：悬疑系列《Bad Roommate--ล้วงลับเมท》、爱情系列《My Super Boss--ปิ๊งรักเจ้านายร้าย》、搞笑系列《Marry Me in 30 days--30วัน ฉันจะมีเธอ》。　　Kwin（Junior饰）是大四学生，他完美但多疑，Kwin在调查他的合租室友Noch（Kad 饰），因为Kwin偷偷得知，Noch不是他所认为那样，在Kwin举办生日那天，他看到Noch钱包里有各个国家的钞票，怀疑他在做一些暗黑生意，并且Kwin刚好听到了一些关于Noch的传闻，为了证明Noch不是坏人，Kwin决定调查真相，从搜查Noch的手机、电脑开始，再到接近Noch，后来Kwin假装向Noch表白，Noch信以为真......说完，看着田遥露出敬佩的神色。以“微笑影楼”和“体育中心”为背景的二个相邻家庭之间日常琐事的情景喜剧。又名《辣白菜，沙拉，笑》，是续《无法阻挡》之后播出的短片搞笑剧。这部戏讲述的是一个像辣白菜一样很普通又很保守传统的家庭（申九的家庭）和另外一个像沙拉一样非常有钱而且很开放的家庭（善宇恩淑的家庭）之间成为亲戚之后发生的搞笑故事。电视剧《同心兄弟》通过小人物反映大背景，描绘壮丽时代，叙述百姓生活，塑造平民英雄，讴歌民族团结。全剧通过援疆干部的动人故事，展现了他们在援疆三年时间里工作、生活中的喜怒哀乐以及大爱无疆的精神风貌，展现了在实施新一轮援疆战略后，全面铺开的产业援疆、干部人才援疆、教育援疆、医疗卫生援疆等方面所取得的成绩，充分展示了援疆干部和新疆干部紧密团结、共同携手建设的崭新面貌。