物理网络

基于物理网络拓扑的P2P系统模型研究

Research on P2P System Model Based on Physical Network Topology

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 .

FlexSystem使用网络系统池和逻辑网络来有效地管理您的虚拟和物理网络。

The Flex System uses network system pools and logical networks to effectively manage your virtual and physical 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 ?

一般的P2P系统在构建覆盖网络时，不考虑物理网络的拓扑结构，导致了较大的网络延迟。

The topology of physical networks is not considered in constructing general P2P system , so the network delay is large .

主机和VLAN交换机一起运作，进行物理网络虚拟化。

Hosts work in concert with VLAN switches to virtualize the physical network .

物理网络情况下，服务器需要通过线缆和交换机互相连接，有时还要通过防火墙/边缘路由器连接到Internet。

In the physical case , servers need to be connected to each other via cables and switches and in some cases connected to the Internet via a firewall / edge router .

然后其他分区就可以以通过虚拟LAN和防火墙传递传输的方式来与物理网络进行通信。

The other partitions can then communicate with the physical network by passing traffic through the virtual LAN and the firewall .

在P2P系统中，Overlay网络是由节点之间相互连接的，构建于底层物理网络之上的一个逻辑网络。

In P2P systems overlay network is a logical network that is built upon physical network and constructed with the connections among peers .

网络是一个隔离的2层网段，类似于物理网络世界中的虚拟LAN（VLAN）。

Network is an isolated layer-2 segment , analogous to a virtual LAN ( VLAN ) in the physical networking world .

当今可找到的大多数WebSphereMQ最佳实践文档都不会建议您将队列管理器名称与物理网络绑定在一起。

Most WebSphere MQ best practice documents you find today will not advise you to tie the queue manager name to the physical network .

为了与其他LPAR共享VIOServer的网络接口，您将不配置物理网络适配器。

In order to share the VIO Server 's network interface with other LPARs , you will not configure the physical network adapter .

社区宽带综合业务网络系统使用交换式以太网技术，在一个物理网络上为社区用户提供Internet接入、数字电视、IP电话等服务，对三网融合进行了实践性探讨。

Community broadband network system with integrated services , which is based on switched ethernet technology , provides Internet access service , DTV , VoIP and etc. for residential users in a single physical network .

在P2P流媒体应用中，由用户节点组成的上层覆盖传输网络（overlaynetwork）存在和下层物理网络拓扑不匹配的问题，造成媒体数据传输延时大、效率低以及骨干网络带宽消耗高等问题。

In P2P streaming , the overlay network consists of peers may mismatch the underlying physical network , which results in larger media transmission latency , low efficiency and high bandwidth consumption .

这个节省是源自物理网络只用于服务器间的通信，服务期间的跨VM通信被隔离。

This savings results from the physical network being used only for communication among servers , with inter-VM traffic isolated within the servers .

在服务器端，主要解决应用层覆盖网拓扑与底层的物理网络拓扑的匹配问题，提出基于IP地址库的节点选择方案。

At the server , we aim to solve the topology mismatching problem between underlying physical network and application layer of streaming media system and present node selection mechanism that based on the IP database .

P2P网络中逻辑网络与物理网络不匹配导致网络流量增加，网络拥塞，同时降低资源定位效率。

In p2p network , the mismatched topology between the overlay network and physical network causes the increase in network flow , network congestion and decreases the efficiency of resource location .

我们看到Terracotta装备了JVM，使这些JVM能越过物理网络透明地共享工作项队列。

We see that Terracotta instruments the JVMs so that they can transparently share a queue of work items across the physical network .

为了使P2P网络能够高效地运行，如何有效地利用物理网络拓扑信息减少路由延迟成为当前需要解决的热点问题。

It has been a hot topic of how to make P2P work more efficiently as well as make full use of the physical network topology to decrease the delay caused by routing .

Kerberos是基于可信第三方KDC使用对称密钥加密算法的认证协议，适合在一个物理网络并不安全的环境下使用。

Kerberos is a authentication protocol based on KDC and symmetry key cryptography . It is used suitably in a physical insecurity network .

很多P2P系统在构造覆盖网络的时候，没有考虑物理网络的拓扑结构，导致了在路由的过程中存在巨大的网络延迟。

Now , many overlay networks are made of P2P systems , but the topology structure of physical network is not consided , and it has tremendous network delay in the process of routing .

发现网络拓扑信息是实现许多关键网络管理任务的先决条件，目前大多数的网络管理工具仅提供逻辑（即IP层）的拓扑发现功能，而要发现物理网络拓扑却是个非常困难的任务。

Discovering network topology is necessary for many critical network mangement tasks , but most commercial network management tools have typically concentrated on discovering logical ( i.e. , layer-3 ) topology . Discovering physical network topology is a complicated task .

由于IPv6地址的结构具有层次性和聚集性，可以利用IPv6的层次化地址分配来做到路由聚集，以解决基于DHT的P2P系统中重叠网络和物理网络脱节的问题。

As IPv6 address are hiberarchy and aggregation , routing aggregation will be done by IPv6 address hiberarchy allocation to resolve the issue of the overlap networks divorcing from a physical network .

它允许使用虚拟I/O服务器（VIO），其中多台主机可以真正地共享一个物理网络适配器。

It allows for the use of Virtual I / O Servers ( VIOs ), where several host machines can actually share one physical network adapter .

通过WDM传输技术和波长路由选择在物理网络上构架光层，可以为高层（如IP层）提供大容量且结构可变的传输通道，这将是下一代骨干网络的核心传输方式。

Constructing the optical layer over the physical networks through the technique of WDM and wavelength routing can provide huge capacity and re-configurable connections for IP layer , whith will become an important transmission method in the future backbone networks .

然而，这些实现在建立Overlay时都没考虑下一层的物理网络拓扑结构，覆盖网络和物理网络的不匹配，导致查询时过多的网络时延。

However , topological structure of the physical networks below the overlay is not considered when building the overlays in these implementations . The mismatching of the overlay network and physical network leads to excessive network latency .

本文针对对等网由于逻辑网络和物理网络的拓扑结构不匹配导致物理路由效率低下的问题，在结构化P2P网络Chord的基础上，提出一种层次式Chord模型。

This paper analyzed the unmatched topology problem between the overlay network and the physical network , which result in inefficient routing . Based on the structured P2P network Chord , this paper proposed a layered Chord model .

在对原有基于SNMPMIB-II的物理网络设备发现算法分析比较的基础上，提出了一种新的算法。

Based on the analysis of the existing physical topology discovery algorithm relying on SNMP MIB II information , a new algorithm is proposed .

对于当前流行的网络拓扑算法，进行分析、比较后，指出这些算法在实际应用中的不足。提出一种改进的基于SNMP的物理网络拓扑发现算法。

After comparing the current popular algorithms of network topology , the paper pointed out the defects of these algorithms in practical application . [ 2 ] Propose an improved physical network topology discovery algorithm based on SNMP .

该算法克服了地址完整性限制的要求，能发现物理网络中交换机端口与交换机端口、交换机与Hub、交换机与主机、主机与Hub的连接。

This algorithm overcomes the complete requirement of the address forwarding table , and can find connections between two different switches ' ports , a switch port and a Hub , a switch and a host , a Hub and a host .