The principle of opening and closing means opening to expansion and closing to modification. When the program needs to be expanded, the original code cannot be modified, but the original code should be expanded to achieve a hot plug effect. Therefore, a summary of one sentence is: in order to make the program scalable, easy to maintain and upgrade. To achieve this effect, we need to use interfaces and abstract classes, etc. We will mention this point in the later specific design.
The first packet discarding scheme will have a slight impact on the user experience, because discarding the first packet retransmission will increase the response time of the service. In view of this, a better TCP Proxy scheme has been developed. All SYN data messages are accepted by the cleaning equipment and processed according to the SYN Cookie scheme. The IP address that successfully established the TCP three-way handshake with the device is determined to be a legitimate user to join the white list. The device disguises the real client IP address, completes the three-way handshake with the real server, and then forwards the data. However, if there is no IP address that shakes hands with the device three times within the specified time, it is determined that the malicious IP address is blocked for a certain period of time. In addition to SYN Cookie combined with TCP Proxy, the cleaning equipment also has the ability to detect a variety of abnormal TCP flag bit packets, and identifies normal access and malicious behavior by returning unexpected responses to SYN messages to test client responses.
响（广濑铃 饰）答应帮助好友千草递情书给关矢老师（中村伦也 饰），哪知道在误打误撞之中将情书放在了伊藤老师（生田斗真 饰）的鞋柜里。伊藤老师是学校里出了名的冷面杀手，平日里看起来毫无感情，但响却在偶然之中发现了他热情善良的一面。实际上，伊藤也曾有过一段刻骨铭心的爱恋，但这段恋情结束的过于惨烈，让他对爱情彻底失去了信心。
大头生活在贫穷落后的农家,有一回他手持扁钻,非常气愤的到赌场,为要回其兄弟诈赌的赌资,一时失手伤了人,从此开始了他浪迹江湖,进出监狱的浪子生涯出狱后到歌舞团当保镖,认识了舞女阿君,又带了阿君离开,过着替人清洗门窗的正当职业,虽日子平苦,却也其乐融融原性不改,依然衣着随便,任意挑逗男人,两人常为此事争吵不休,大打出手离家出走之后,大头心情恶劣又涉足赌场,却被当场识破庄家作假,并抓到证据该赌场的三郎,事后心有不甘,吩咐其手下鎚哥携土制手枪尾随大头身后,趁机下手,不料手枪走火,误伤自己,反被大头救了一命,从此鎚哥不但成了大头的心腹,大头更是因此义举赢得了老大的赏识,还收到了与三郎分庭抗衡的重要手下,而阿君也在此时回到大头身边,但好景不长
一艘华丽的跨大西洋轮船，载满了乘客，他们从欧洲前往南美，寻求更美好的未来。其中，伊娃（伊万娜·巴克罗饰演）和卡罗琳娜（亚历杭德拉·奥涅瓦饰演）是两姐妹，她们差异甚大却形影不离。尼古拉斯·萨拉（乔·科塔加伦那饰演）是一位英俊的长官，因命运捉弄而出现在了错误的地点。船上有一个待解的谜团：一名乘客被谋杀，他的名字没有出现在乘客名单上，也没有人记得他的名字。浪漫爱情、阴谋诡计还有许多谎言…这艘船上每间舱室的人内心深藏着一个故事和一个黑暗的秘密。只有一件事是明了的：凶手就在这艘船上。
Ha Xuesheng, director of the program department of CCTV's financial channel, believes that cultural media, charming cities and industrial capital are the three carriages of the alliance and are indispensable. The "Charming China City-City Alliance" is first a resource platform for the cultural and tourism industry, forming an ecological circle of resource sharing under the framework of "media + city + industry". Secondly, according to the needs of the city, it provides support, assistance and services for strategic planning and tactical guidance in the aspects of city brand building, city image publicity, city cultural tourism resources development, and research and development of innovative and creative products in the city cultural tourism industry. Third, it is an open platform for the exchange of cultural and tourism industries. It is also a platform for the exchange of experiences, industrial cooperation and exchange of needs between cities inside and outside the alliance. Fourth, it is the operating platform of "all-in-one card".
信上，香荽让墨鲫放心，说自己一定帮她把这个谎给圆了，坚决不让这门亲再出岔子。
Norton Security with Backup (up to version 22.6. X.x)
从美国归来的弟弟陆远航为了报复哥哥陆耕农多年前的杀父夺爱之恨，利用八大集团的财富和已是剑北市首富的陆耕农展开了一场殊死的商战，以此想打垮耕农及其领导的耕农集团。陆耕农此时正要与未婚妻薛云举行大婚，而各种打击接踵而至，为此他焦头烂额。但即便远航步步相逼，耕农却一再忍让，似有很多难言之隐。虽不同父，毕竟兄弟相称，尽管陆耕农知道陆远航是养子，但并无可靠的证据来说服陆远航相信，并且当年告密、夺走陆远航情人诸事确是耕农所为，出于愧疚陆耕农投鼠忌器，节节败退。而陆远航并不善罢甘休，复仇的火焰吞噬了他的理智，他要置陆耕农于死地。兄弟二人并不知道在他们背后隐藏着更大的阴谋。原来夏伯清、张家全父子一直在坐山观虎斗，并拉拢了薛云，在暗中推波助澜，以收渔翁之利。夏伯清是当年害死陆耕农父亲陆禾的元凶，也是策划陆耕农前妻夏吟“投湖自杀”的主谋，张家全表面上与陆耕农亲如兄弟，其实一直觊觎着耕农集团的财产，薛云虽然深爱陆耕农，但陆耕农对死去的前妻夏吟念念不忘令她耿耿于怀。就在夏伯清父子即将得手之际，夏吟的“死而复生”
青鸾郡主他一定得娶。
约翰•波特（John Porter）回来了，而这一次他处在一个前所未有的困境中。
So let's explain the rules of iptables in a common way. There was an analogy before, Each "chain" is a "checkpoint", Every message passing through this "level" must match the rules on this level. If there is a match, The message is processed correspondingly, For example, you and I are like two "messages" at the moment. Both of you and I are going to enter the customs at this moment. But the duke has a life, Only the imposing person can enter the customs, Those who do not meet this requirement are not allowed to enter the customs. So the soldiers guarding the customs followed the "rules" formulated by the duke. I began to look at you and me. In the end, you entered the customs smoothly, and I was rejected. Because you met the standard of "dignity", you were "released", while I did not meet the standard, so I was not released. In fact, "dignity" is a kind of "matching condition", "release" is a kind of "action", and "matching condition" and "action" form the rules.
你当自个还是十几二十岁哩，跟他们比。
我们争取到的不过是一些时间，九江国的牵制作用无疑会下降。
本節目以下列事件作為藍本、改編成鬼魅懸疑故事，以全戲劇形式拍攝，藉梁思浩與各詭異事件的主角們真誠對話，帶出一幕幕不可思議的情節，更會邀請靈異專家一同探討箇中奧秘…
Five, the difference between mind map and traditional linear note-taking
颜值爆表的校园女神，将带你盛夏狂欢。从8月份开启，首轮线上选拔将为期三周，随后的各地海选将设置北京、杭州、成都、西安、青岛、深圳、长春7大赛区，覆盖全国 200 多所重点高校，吸引各大高校女孩报名，更将有层层选拔等待着她们。而最终突出重围，成为全国十强的“狐友国民校花”将有望签约搜狐视频，出演自制剧，步向演艺圈。
小葱抹了一把泪，伸手攥住他手腕，轻声道：你别急。
