The most basic defense at the network layer is RFC? 2827 [3]. Using input source filtering, ISP refuses to route a packet whose source IP address does not belong to its source subnet further. Input source filtering can effectively prevent SYN flooding attacks disguised as IP. However, this method is useless at present because it is difficult to deploy on a large scale. Moreover, input source filtering cannot resist distributed attacks.
Reference
-Liu Shiying (Financial Writer and Founder of President's Reading Club)
同样地，看着杨长帆的决然，吴凌珑也是想不到那些的。
孩子，不要哭，要坚强。
上虞县祝家庄，玉水河边的庄园内住着美丽贤淑的千金小姐祝英台（袁雪芬 饰），她见读书人在庄前来来往往，分外羡慕，无奈封建礼教女子无才便是德，父亲决不允许她走出闺阁半步。英台为此唉声叹气，继而心生一计，乔装成卜卦先生说动父亲，终于获准出门前往杭城读书。她遵照父亲指示，打扮成男子模样外出，三年学成后即刻还家。英台得偿所愿，兴高采烈，在前往杭城的途中结识了来自会稽的翩翩公子梁山伯（范瑞娟 饰）。二人相谈甚欢，志同道合，引为知己。求学期间，英台小心隐瞒身份，与梁兄的友情日益加深，且暗暗喜欢上这个博学的公子。转眼三年，英台接到父亲的催返家书。情意缱绻的十八相送，虽然暗示有情郎，无奈一别终成永远…… 本片根据中国传统民间故事改编。
It means that each contestant initially carries a certain number of points to compete. If a player's points on the table lose negative or less than a certain amount of requirements, that is, the so-called "stand-up", the player will be eliminated. This kind of competition system is simply called "beating out".
5. "Ring lamp" means a signal lamp that displays uninterrupted lights within a 360-degree horizontal arc.
永平帝哪里肯听他的解释，骂道：他没这个胆子？他不是混世魔王吗，他什么事不敢做？见胡敦还苦求明察，皇帝恼火，大叫来人，吩咐龙禁卫带一名内侍去京都府衙，严知府审案情形如何，如实回报。
到底是自己忽略了，昔年因为自己的疏忽和犹豫断送了女婿扶苏的性命和大秦帝国的国运。
青衣男子住在这山谷已经十年了，每天或是抚琴写字，闲看日出日落，或是与大雕相伴，行走在无量荒山。
This is a place where the construction of a new socialist countryside is quite effective. Because residents have more contacts with the outside world and more channels to obtain information, the ideological struggle is relatively open, so our work is relatively simple, the villagers are very concerned about state affairs, and many things do not need us to say they understand, even understand more and more comprehensive than us. This makes us basically have nothing to do. In spite of this, everyone feels happy. After all, the purpose of our visit is to let our farmers know about some national policies and forms. Since everyone knows that we have also ended up at leisure, we can free up more time to help those villagers who need help, and we have also improved our work efficiency. The villagers are very enthusiastic, Because I am a rural child myself, Therefore, I am used to everything with everyone in the countryside. Happy days always pass quickly. The seven-day "three rural areas" will soon pass and we will go back. In these short days, we have established deep feelings with our villagers' friends. When we leave, everyone is very reluctant to give up and promises to come often in the future.
书商紧逼周文昌，欲言法庭相见，紧急中刘梦伸出援手……孔亮将所挣百万元又一次投入股市，转瞬间，损失惨重……
家政夫三田园2(家政夫のミタゾノ 2)是日本朝日电视台制作播出的悬疑剧，讲述了男扮女装的家政服务员三田园揭开雇主家秘密，用非常手段解决他们的家庭问题的故事。
With the evolution of human beings, the methods we try to destroy each other are also evolving. The emergence of the Internet gave birth to a new war, a quieter war. One mode of warfare is real-time long-range scattered attacks and anonymous warfare. A kind of war with robots and unmanned aerial vehicles as the main force, attacking according to our requirements, or artificial intelligence as the strategist.
在两个赛季中，拉里继续追求他的激情写作，尽管一个新的浪漫的方式获得；莱斯利决定去探索自己的创业精神；玛歌是男孩疯狂和让人彻底不适合玩；和Gerry，谁喜欢动物的人，非常高兴，当他发现一只水獭是住在家里。丹尼尔莱派恩加入投本赛季Hugh Jarvis–英国绅士集的视线路易莎。但是，在她试图嫁给斯文的失败后，路易莎会为她生命中的新男人做好准备吗？（以上来自软件翻译）
该剧由著名实力男演员姜超携手李依晓、潘阳主演，《相亲相爱》一共分为三集，讲述的是姜超饰演的富二代“冯海”的爆笑别样相亲经历趣事。 由曾创作《卖拐》、《卖车》等春晚小品的著名编剧宫凯波执笔，讲述了一个有关亲情的故事，风格诙谐、喜庆。
该剧讲述了经侦队长萧剑与金融天才胥枫屡屡交手，最终破获跨国金融案件的故事。
? Use at least three city-country pairs to call this function and print the value it returns.
