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(1) Two vertical ring lamps, green at the top and white at the bottom, or a number consisting of two cones vertical at the top and bottom and butted at the tip;For spoofing attacks, the first thing to consider is to choose the address. For the attack to succeed, the host on the spoofed IP address must not respond to any SYN-ACK packets sent to them. A very simple method that an attacker can use is to disguise only one source IP address, and this IP address will not respond to SYN-ACK packets, perhaps because there is no host on this IP address at all, or because some configuration has been made to the address or network properties of the host. Another option is to disguise many source addresses, and attackers will assume that hosts on some of these disguised addresses will not respond to SYN-ACK packets. To implement this method, you need to recycle the addresses on the list of source IP addresses that the server wants to connect to, or make the same modifications to hosts in a subnet.For example, we often validate forms, such as the registration login dialog box. We need to validate before logging in: for example, there are the following logics:　　但被肖童拒绝。欧庆春在追查案件时，发现欧阳兰兰的母亲欧阳惠是贩毒团伙的头目。肖童得知欧庆春所在的刑警大队需要一名内线打进欧阳惠集团的内部进行侦察，为了欧庆春，也为了缉毒的正义事业。Windows Virtual Optical Drive (Daemon Tools Lite) Considerations当看见桌案后端坐的严克副将军，胡钧一颗心才放下，长长出了一口气。