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During the DNS NXDOMAIN Flood attack, multiple queries will be made to the DNS server, making the cache of the DNS server store the query results of the attacker, eventually causing the speed of DNS resolution requests of normal users to slow down.　　时马永祯（郭晋安饰）与妹利是妹到处招摇撞骗，永祯遇上若岚，被误认为“大师兄”，苦苦相缠，永祯为报复双春，曾识破他在镇上骗饮骗食，于是利用若岚到小酒家工作，乘机敛财，不料竟连累小酒家欠下巨债，惹上官非。 其后永祯无意中得知双春及其好友梁九妹（郭政鸿饰）是儿时患难之交，尽释前嫌，决心帮双春解决小酒家危机……　　三鬼找到耕田要出大价钱要耕田把地转包给他，耕田不同意，为此婆姨秀兰和儿子青山与耕田闹起了矛盾。青山以为三鬼花大价钱包地是因为地里头有老年间埋的金元宝，半夜刨了老刘家祖坟，气得刘怀仁来找耕田算账。香荽打断他们的话，继续问大苞谷遇见陈家人的经过。General principle: Open Close Principle)The above is the specific process of three handshakes. Seeing here, you may have a question. Usually we only call when establishing a connection with the server, and we do not shake hands three times. In fact, this high-level concept is an abstraction of the three-time handshake, and its concrete implementation completes the three-time handshake process.Three, run block? Command to fill in "Elevation" in "Name" of "Block Definition" window; Click the button to the left of "Pickup Point" and the "Block Definition" window will be temporarily hidden. Capture and click the corner point under the triangle on the graph, and the window will reappear. Click the button on the left side of "Select Object" and the "Block Definition" window will be temporarily hidden again. After selecting the whole graphic, press Enter and the window will appear again. Click Convert to Block; Click OK to close the Block Definition window.