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晚上有辗转得知项羽和范增商定要在新丰洪门设宴邀刘邦前来。刘蝉儿失笑道：这你也信？我跟你说，当娘的总是跟自己的娃儿说：你要跟那谁谁一样。"Do you remember what type of explosive cylinder your company commander used at that time?" I asked.小葱忙点头答应，郑氏也无语，算是同意了。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.崔益钧和李三顺是一对生活在韩国京北山区中的老夫妇，年届耄耋的他们仍无法放下手中的活计，终日往返小家和田地之间。相比能说会道且经常抱怨的老婆，崔益钧显得沉默寡言。他童年时一条腿遭受枪伤，导致行动不便，农活更成为一大难题。幸亏一头老黄牛常伴左右，四十多年来，老黄牛不仅帮夫妇俩分担大部分劳动，还使他们得以供子女上学，崔益钧老人对黄牛疼爱有加，甚至胜过妻子。春去秋来，烈日寒霜，时间在重复中缓缓流淌。转眼经年，夫妇俩年事已高，步履蹒跚，而操劳多年的老黄牛也即将走到生命的尽头……Chapter 31