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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.一向小鸟依人的翘儿突然不干了，就是不干，她有她的道理，相公，你好不容易活过来，现在真不是行房事的时候，你若碰我一下，又……那啥了，我可又得死一次了。年轻的网络设计师陶侃（陆毅扮演）在一次作品比赛中结识了柳翠芸（蒋虹扮演）。两人为一件作品产生争议，互不服输，成了“冤家”。陶侃与好友，香港青年何嘉林（陈浩民扮演）、杨慧敏（叶璇扮演）成立了青春网销公司，立志要在这一新兴行业中有所作为。不料，翠芸工作的欣欣房产公司与青春公司恰在同一幢办公大楼内，陶侃和翠芸，冤家路窄，两人一见面就相互嘲讽……该剧最核心的部份，说的是英国古老的“大法官庭”（Chancery），它是司法体制邪恶、无能的象征。《荒凉山庄》被视为狄更斯的代表作之一，如今改编成一出流畅、大胆又引人入胜的电视剧。电视版保留了原着的惊悚、浪漫和巧妙的喜感，但是少了原着的多愁善感，使得这出脉动又尖锐的电视剧让观众看得入迷，无法自已……本剧曾获2006年英国BATFA最佳电视剧奖项。该片根据伊恩·麦克尤恩的同名小说改编，故事讲述原本幸福生活着的儿童文学作家斯蒂芬·刘易斯，因女儿的走失，自己消极度日，变得和妻子渐行渐远。直到第二个孩子的降临才逐渐化解了夫妻隔阂。解放军从死人堆里救了酷似“学生”的吉美娟，并收留到卫生所作卫生员。副政委左严华对年轻美丽的吉美娟产生了爱意，而吉美娟却被团长马玉良的魅力深深地打动……吴匪第二大队队长曹泽英趁解放军袭击展希方部的时候，从独立团副政委左严华手中劫持了展希芳的洋太太及部队家眷迫使展希芳投奔自己，台湾当局为使展希芳能取代吴南山，先以情报技术支持为名派女谍报员丽娜到吴南山的匪巢，后又派出谍报精英“特派员”，马龙协助吴南山，实际是寻找机会与展希芳联系推翻吴南山。