Mobile networks typically use an IPv4 NAT to allocate devices one of the "private" classes of network, such as the 10.x.x.x network or the 192.168.x.x network commonly found at hotspots.
移动网络通常都会使用IPv4NAT为每个设备分配一个“私有”类型的网络，比如人们在热点通常会找到10.x.x.x网络或是192.168.x.x网络。
The shortage of IP addresses is only one reason to use NAT. Two other good reasons are
IP地址的短缺仅仅是使用NAT的一个原因。
When a computer on the stub domain that has an inside local address wants to communicate outside the network, the packet goes to one of the NAT routers by way of normal routing to the default-gateway.
当一台在存根域 (网络) 中被分配了内部本地地址的计算机想要和外部网络通信时，数据包就会像通常一样被路由到其默认网关，此时网管充当NAT路由器功能。
Clients may also need Network address Translation (NAT) when there are multiple internal computers and only one public IP address.
当有多台内部计算机和一个公共ip地址时，客户端可能也需要网络地址转换(NAT)。
Well, how the correspondence software based on SIP pass through NAT is one important question in the SIP applied research.
因此在SIP通信中，如何使基于SIP的通信软件穿越NAT是SIP应用研究中的一个重要问题。
NAT, some IP addresses left for special nets to use repeatedly, is one of the effective way in Internet.
网络地址转换（NAT）是一种在目前网络环境中比较有效的方法，即，将某些IP地址留出来供专用网络重复使用。
NAT would do network address translation for outbound packet so that inside hosts can use reserved IP addresses and outside hosts can not visit inside ones directly to realize one-way communication.
NAT对内网主机的出网数据包进行网络地址变换，内网主机可以使用保留地址上网，外网主机无法直接访问内网主机，从而实现单向通信。
One major part of this thesis is about the essential issues in providing a successful solution of end to end communication based on SIP in NAT and firewall entironments.
本文探讨在NAT环境下实现基于SIP的端到端通信将会出现的问题及其有效解决方案。
One major part of this thesis is about the essential issues in providing a successful solution of end to end communication based on SIP in NAT and firewall entironments.
本文探讨在NAT环境下实现基于SIP的端到端通信将会出现的问题及其有效解决方案。
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