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发表于 2006-8-10 19:16:06
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<BLOCKQUOTE><STRONG>引用</STRONG>:<HR>原文由 <B>冰天冰</B> 发表于 <I>2006-8-10 14:46:46</I> :<BR><BLOCKQUOTE><STRONG>引用</STRONG>:<HR>原文由 <B>rainypan</B> 发表于 <I>2006-8-10 1:19:16</I> :<BR><BLOCKQUOTE><STRONG>引用</STRONG>:<HR>原文由 <B>冰天冰</B> 发表于 <I>2006-8-10 0:08:00</I> :<BR><P>QUESTION NO: 34<BR>Which one of the following varieties of NAT utilizes different ports to map multiple<BR>IP addresses to a single globally registered IP address?<BR>A. Static NAT<BR>B. Port loading<BR>C. NAT Overloading<BR>D. Dynamic NAT<BR>E. None of the above<BR>Answer: C<BR>Explanation:<BR>Port address translation, or NAT overloading, uses transport layer port information to<BR>dynamically create NAT entries. This is also known as one to many network address<BR>translation.<BR>Incorrect Answers:<BR>A. Static NAT is known as one to one NAT, and is used to map a single IP address to a<BR>single registered IP address. It is often used for servers that need to be accessed via the<BR>Internet.<BR>B, D. This is the incorrect term, and is not used.</P><P>这道题目意思不理解,请教TS</P><HR></BLOCKQUOTE><P>端口NAT,也就是PAT。。。利用端口映射可以让一个地址拖动内网多个地址同时上网,就是我们平常使用的上网方式了。呵呵</P><P>different ports to map multiple IP addresses 这句话</P><HR></BLOCKQUOTE><P>B. Port loading<BR>C. NAT Overloading 这两选项是什么意思?</P><HR></BLOCKQUOTE><P>B是端口过载,不知所云,呵呵,应该是静态的端口映射吧,把内网某台服务器上的私有IP的服务端口映射到网关公网IP的相应端口,可以让外网用户访问内网服务</P><P>C是NAT过载,也叫PAT,是公网IP与内网IP一对多的网络地址转换方式,这个很常用,具体这种技术的原理是什么,我上课时候重点讲。</P> |
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