blocks|key|1167374|text|他说:是的，如果服务器有一个静态IP客户端，那么总是能够指望服务器位于该IP地址。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1167375|他说:很可能，是的。在许多网络中，DHCP服务器将把相同的IP返回给已重新启动的计算机，但您当然不应该指望它。|1167376|是的-动态分配的IP地址有一个"TTL“-一个生存的时间。这可能是一段很长的时间(数周或更长时间)，但它们仍有可能到期和改变。大多数情况下，机器将得到相同的IP，但同样，您不应该指望它。|1167377|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

1: Yes, if the server has a static IP clients will always be able to count on the server being at that IP address.

2: Most likely, yes. In many networks the DHCP server will give the same IP back to a machine that has rebooted but you certainly should not count on that.

3: Yes - dynamically assigned IP addresses have a "TTL" - a time to live. This may be a long time (weeks or more) but they still could expire and change. Most often the machine will get the same IP back but, again, you should not count on that.

blocks|key|1814142|text|是的，静态ip地址意味着它是固定的。当然，整个系统还有更多，因为IP被解析成MAC地址。尽管如此，静态IP+(假设它只出现在网络上一次)意味着任何具有该IP的机器都会响应。这样，客户端就可以始终连接到IP地址。|type|ordered-list-item|depth|inlineStyleRanges|entityRanges|data|1814143|注意:并不是一个非常友好的方式。|unstyled|1814144|仅仅因为某些东西有一个“动态”IP地址，并不一定意味着它每一次都会改变。使用DHCP，每次都可以将相同的IP地址分配到相同的MAC地址。这是一种比对机器硬编码IP地址更好的方法。
此外，您真的不应该让让您的客户端使用IP地址进行连接。他们应该在DNS中用名字查找机器。您可以将DNS查找协调到DHCP，因此，机器只需要解析主机名就不需要做任何事情。
但是，根据您的问题，如果机器使用DHCP，每次不接收相同的IP地址，并且您的客户端通过IP地址连接，那么在每次新分配时，客户端将需要新的IP地址。|offset|length|style|BOLD|1814145|机器的IP地址是否更新，即使不重新启动，也是由DHCP服务器控制的策略。一般来说，IP地址有更新的时间。在DHCP会话期间，客户端可能请求相同的IP地址，但这取决于服务器是否发出相同的IP地址。相反，只要DHCP缓存是当前的，大多数服务器都被配置为向给定的MAC地址发送相同的IP地址。这完全是一项政策决定。|1814146|然而，最终，您似乎试图将客户端绑定到服务器的IP地址，这不是一个好策略。使用DNS并让客户端解析主机名是一种更好的策略。如果我不正确地推断你的意图，我道歉。|1814147|注意:我使用作为提供动态IP地址的方式。你可能会使用其他的策略，但我认为这个概念是一样的。|1814148|entityMap^0|0|0|2S|22|4V|21|0|0|4A|0|0|26|0|0|19|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$]]|$1|E|3|F|5|6|7|U|8|@$G|V|H|W|I|J]|$G|X|H|Y|I|J]]|9|@]|A|$]]|$1|K|3|L|5|6|7|Z|8|@$G|10|H|11|I|J]]|9|@]|A|$]]|$1|M|3|N|5|D|7|12|8|@$G|13|H|14|I|J]]|9|@]|A|$]]|$1|O|3|P|5|D|7|15|8|@$G|16|H|17|I|J]]|9|@]|A|$]]|$1|Q|3|-4|5|D|7|18|8|@]|9|@]|A|$]]]|R|$]]

<ol>
<li>Yes, a static ip address means that it is fixed. There is more to the whole system, of course, since there is resolution of an IP to a MAC address. Nonetheless, a static IP (assuming it is only on the network once) means that any machine with that IP will respond. So a client can always connect to the IP address.</li>
</ol>

Note: not a very friendly way to go.

<ol start="2">
<li>Just because something has a "dynamic" IP address does not necessarily mean it changes every single time. Using DHCP it is possible to assign the same IP address to the same MAC address each time. It is a much better approach than hardcoding an IP address to a machine.

In addition, you really should not have your clients use an IP address to connect. They should look up the machine by a name in DNS. You can coordinate the DNS lookup to the DHCP, so machines do not need to do anything but resolve the hostname.

However, as your question stands, if a machine uses DHCP and does not receive the same IP address each time, and you have your clients connecting by IP address, then on each new assignment the clients would need the new IP address.</li>
<li>Whether a machine's IP address updates even when it does not restart is a policy that is controlled by the DHCP server. In general, there is a renewal time for an IP address. Without going into great deal, the client during the DHCP conversation may request the same IP address, but it is up to the server as to whether to hand out the same one or not. Conversely, most servers are configured to hand out the same IP address to a given MAC address as long as the DHCP cache is current. It is completely a policy decision.</li>
</ol>

At the end of the day, however, it seems like you are attempting to tie clients to a server's IP address, and this is not a good strategy. It is a better strategy to use DNS and have the clients resolve a hostname. If I am incorrectly inferring your intent, I apologize.

NOTE: I have used DHCP as the way to give out dynamic IP addresses. You might use some other strategy, but I think the concept is the same.

Let's say we are hosting on a Personal Computer and Server Program is written in Java.

1.If we host server using static IP-address then does that means we can change machine and replace it with other ones, restart machine as many times we want and our Client will still be able to communicate with us after system is back?
2.if we host server using Dynamic IP-address then just by restarting once the machine we have to tell every single client out there that new IP-address is this one? 
3.Will Dynamic IP-addresses change even if we don't restart the machine ?

Static and Dynamic Ip address problems

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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假设我们托管在个人计算机上，服务器程序是用Java编写的。1.如果我们的主机服务器使用静态IP地址，那么这是否意味着我们可以更换机器并将其替换为其他机器，那么我们需要多少次重新启动机器，而我们的客户端在系统返回后仍然能够与我们通信?2.如果我们使用动态IP地址，那么只要重新启动一次机器，我们就必须告诉每个客户端，新的I...

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