For defending denial of service attack and ports scanning, we adopt corresponding measures in network layer and transport layer.

对于防御拒绝服务攻击与端口扫描，我们在网络层与传输层分别采取相应的措施进行防范。

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Attack An attempt to circumvent the security measures in place on a network either to gain unauthorized access to the system or to force a denial of service.

试图破解网络上某一处的安全防护措施，以便在未获得授权的情况下访问系统或者是遭到服务拒绝。

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This paper introduces the implications, phenomena, and methods of the attack of the service denial on the Internet, and offers a few preventive measures.

介绍了国际互联网中拒绝服务攻击的含义、现象和方法，并提出了一些防范措施。

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So the debate must first pass through half-measures and denial.

ECONOMIST: America��s postal service will begin to undo itself