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过着关系好的朋友·泽良宜志法、美笠天智、四部诚、心木宽松、充实的每一天。The content of the website is stored on the source server, and the CDN is the cache of the content. Users are only allowed to access the CDN. If the content is not on the CDN, the CDN sends a request to the source server. In this way, as long as the CDN is large enough, it can resist great attacks. However, this method has a premise that most of the content of the website must be statically cached. For websites (such as forums) with dynamic content as the main content, we must think of other ways to minimize users' requests for dynamic data.各种忙碌的工作小故事比尔·斯卡斯加德将主演Netflix瑞典语6集新剧《克拉克》(Clark，暂译)。乔纳斯·阿克伦德([极线杀手])执导， 乔纳斯与Fredrik Agetoft、Peter Arrhenius共同操刀剧本。比尔将饰演臭名昭著的瑞典罪犯克拉克·欧洛弗森。克拉克曾因谋杀、抢劫、侵犯人身和贩毒等罪名被判刑，一生中多数时间在监狱度过。其知名的罪行之一是在斯德哥尔摩诺马尔姆广场劫案中与他人共同挟持人质，而这些人质反而对他们产生了感激，这就是斯德哥尔摩综合征一词的来源。2. The registerForm.onsubmit function lacks flexibility. If we add a new validation rule or want to change the length validation of passwords from 6 to 8, we must change the code inside the registerForm.onsubmit function. Violating the open-closed principle.对此田横表示理解，本来就没有报多大希望。The third handshake: the client receives the SYN + ACK packet from the server and sends the confirmation packet ACK (ack=k+1) to the server. After the packet is sent, the client and the server enter the ESTABLISHED state and complete the three handshakes.