在物理网络层控制路由需要将策略嵌入到拓扑中。
Controlling routing at the physical network layer embeds policy into topology.
IP完全抽走了物理网络基础设施提供商的价值。
IP neatly takes the provider of the physical network infrastructure out of the value proposition.
虚拟机行为就像直接连接到物理网络。
Virtual machine behaves like directly connected to the physical network.
网络栈底部是负责管理物理网络设备的设备驱动程序。
At the bottom of the network stack are the device drivers that manage the physical network devices.
有两个物理网络：一个用于计算通信量，一个用于存储。
There are two physical networks: one for compute traffic and one for storage.
同样，这是将安全策略嵌入物理网络设计中的一种实践。
Once again, this is the practice of embedding security policy into the physical network design.
互联网主要是给有个人电脑和物理网络连接的人使用的。
The Internet is used mainly by people with personal computers and a physical network connection.
还要注意，消息的路由是通过重新连接物理网络来完成的。
Note also that the routing of messages is accomplished by reconnecting the physical network.
这个可伸缩的计算模型把物理网络和服务器抽象为虚拟形式。
This scalable computing model moves away from physical networks and servers in favor of virtual ones.
这种方法的问题在于，它迫使我们将授权策略嵌入物理网络。
The problem with this is that it forces us to embed the authorization policy into the physical network.
这会防止在安装所用的物理网络适配器上配置IP地址。
This will prevent an IP address being configured on the physical network adapter used for the install.
本发明提供一种物理网络拓扑的发现方法及装置。
The invention provides a method and device for discovering physical network topology.
IP在底层物理网络的边界之间提供最基本的数据报传递形式。
IP provides the most basic form of datagram delivery across the boundaries of the underlying physical networks.
IP的首要目标是要跨越多个不同物理网络进行连接。
The foremost design goal of IP is to cross multiple, physically different networks.
一个默认的帧中继wan被分类为哪种物理网络类型？
A default Frame Relay WAN is classified as what type of physical network?
合并——物理网络可以被组合成一个单一的虚拟网络来整体简化管理。
Consolidation - Physical networks can be combined into one virtual network for overall simplification of management.
将名称解析向上移动到集群意味着路由不再与物理网络连接绑定在一起。
Moving the name resolution up into the cluster means routing is no longer tied to the physical network connectivity.
子网物理网络拓扑发现模块和全网物理网络拓扑获取模块。
The device comprises a subnet physical network topology discovery module and a total physical network topology obtaining module.
将私有地址名称映射到公共地址名称，并选择物理网络适配器的线路名称。
Now, add the NAT rule. Right click, and select Map your private address name to your public address name, and select the line name of your physical network adapter.
每个层都使用下面一层的服务，这使得顶层协议能够在物理网络上传输消息。
Each layer employs the services of the layer underneath, which enables a top layer protocol to transmit messages over the physical network.
其实消费者并不关心物理网络，最重要的还是在乎网络服务和价格。
Consumers are not actually care about physical network, the most important or care about network service and price.
然而，当我们从物理网络转移到逻辑网络时，可视化就变得愈加困难。
However, when we move from physical to logical networks, the visualization becomes much more difficult.
它使用刚才创建的SEA，通过物理网络适配器来访问公共网络(请参见清单3)。
It USES the physical network adapter using the SEA just created to access the public network (see Listing 3).
针对这个不足提出一种改进的基于地址转发表的物理网络拓扑发现算法。
Aiming at this insufficiency, we propose a new physical Network topology discovery algorithm based on address forwarding table.
不过，在大部分情况下，您需要连接到虚拟以太网的分区也能够与物理网络进行通信。
In most cases, however, you will want to allow partitions connected to a virtual Ethernet to also communicate with the physical network.
这样，无线设备可以查找任何自己想要找的内容，就好像自己完全连接在物理网络上。
That way, the wireless device looks for all intents as though it's simply attached to the physical network.
诸如计算机网络之类的物理网络可以以非常理想、非常高效的方式规划、实现和管理。
Physical networks like computer networks are some things that can be planned, implemented and managed very optimally and efficiently.
覆盖网可以看成是一个全连通虚拟网络，前提是底层物理网络不能分隔开。
An overlay network can be considered a fully connected virtual network as long as the underlying physical network does not partition.
这些混合设备充当虚拟网络的虚拟交换机和路由器，这些虚拟网络构筑于物理网络之上。
These hybrid devices act as virtual switches and routers of this virtual network which essentially sits above your physical network.
对等系统常常实现为一个抽象的覆盖网络，构建于原生或物理网络之上的应用程序层上。
Peer-to-peer systems are often implemented as an abstract overlay network built at the application layer on top of the native or physical network.
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