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问题 单项选择题

POP3服务器使用的守候端口是______。

A．TCP的25端口

B．TCP的110端口

C．LTDP的25端口

D．LIDP的110端口

答案

参考答案：B

解析： POP3是邮局协议POP的第三个主要版本，它允许用户通过计算机动态监测邮件服务器上的邮件。POP3服务器使用的守候端口是TCP协议的110端口，故选项B正确。

单项选择题

Most computer systems are (16) to two different groups of attacks: Insider attacks and outsider attacks. A system that is known to be (17) to an outsider attack by preventing.
(18) from outside can still be vulnerable to the insider attacks accomplished by abusive usage of (19) users. Detecting such abusive usage as well as attacks by outsides not only provides information on damage assessment, but also helps to prevent future attacks. These attacks are usually (20) by tools referred to as Intrusion Detection Systems.

A．reliable

B．secure

C．indestructible

D．steady
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判断题

一人有限责任公司股东不能证明公司财产独立于股东自己的财产的，应当对公司债务承担连带责任。
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