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Reflective attacks typically use protocols that do not require authentication or handshake, The reflection attack needs to forge the source ip address of the requested data into the ip address of the target. If the protocol used requires authentication or handshake, the authentication or handshake process cannot be completed and the next attack cannot be carried out. Therefore, most reflection attacks are carried out by network services based on udp protocol.(2) Under the condition of low temperature, the elastic cushion plays the function of automatic compensation, ensuring the sealing performance of the valve, with simple and compact structure, good sealing performance, convenient installation and disassembly, and strong practicability.But I will never abandon the pit, to trust the landlord从这一季开始更换了片尾曲，体现出超人的进一步成长，要处理更困难的局面,对付更黑暗的敌人。讲述AFF和哥哥嫂嫂住在一起，有一次哥哥去了外地，嫂子趁机逼她搬出去，要她找工作独自谋生。此时， POH哥的农场正在聘请主管，AFF获悉后准备前往应聘。在去到农场的途中，POH哥开车不小心撞到AFF，POH哥性格霸道强硬，是个独断专行的人，他紧急刹车，并下车愤怒的指责AFF走路不看路。AFF个性独立，也是个不肯轻易妥协的主，乍见这么不讲理的男人，便毫不客气的针锋相对。第一次的争吵，已经决定了日后相处的主旋律。