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Large traffic attacks saturate the bandwidth and infrastructure of the network through massive traffic and consume them completely, thus realizing the purpose of flooding the network. Once the traffic exceeds the capacity of the network or the ability of the network to connect to other parts of the Internet, the network will not be accessible, as shown in the above figure. Examples of heavy traffic attacks include ICMP, fragmentation, and UDP floods.听说老宰相既未求情也未强势阻止，竟是不闻不问，皇帝心里有些不安近卫军中的精锐早已先一步观察，清理两边的建筑和可能的危险来源。根据小说《三年K班》改编。17岁的京芷卉因为一次交通意外导致分班考失利进入了学习氛围较差的高三十一班，京芷卉多次尝试离开十一班都最终失败，只得将目标转向了优秀学生干部的高考加分，并为此设定了获取全班同学信任的攻略计划，原本抱着功利目的与同学接触的京芷卉却渐渐在同学们身上发现了各种优质品质，经过数次欢笑与泪水后，京芷卉开始渐渐融入到十一班的集体之中，十一班渐渐改变了吊尾班的命运，大家顺利完成高考进入各自理想大学，留下一段难以忘怀的青春记忆。(2) Civil Aircraft Driver License (Business License or Route Transportation License)When the coil is energized, the iron core attracts the armature and the support plate to move down, and the contact points are turned on or off instantly. The piston rod and the lever slowly decrease due to the influence of the blocking nylon. After a certain period of time, the piston rod decreases to a certain position, and the delayed action contact is pushed by the lever to act, which is in an open state, while the moving contact is closed. The delay time of the relay is the time when the coil is energized until the delay contact completes its action. When the coil is powered off, the relay is restored by the recovery action of the spring.