diffserv vs intserv |intserv vs diffserv模型
DIFFSERV(差异化服务)是用于在Internet中提供QoS(服务质量)的模型。这改善了互联网区分流量提供的最佳努力服务。对于差异化,它使用用户,服务要求等事实。根据这种差异,将不同级别的服务提供给不同的数据包。Intserv(集成服务)也是在网络中提供QoS的模型。Intserv基于使用带宽预订技术在Internet上构建虚拟电路。保留带宽的请求来自需要某种服务水平的应用程序。
什么是diffserv?
DIFFSERV是通过区分流量来提供互联网中QoS的模型。Internet中使用的最佳努力方法试图根据不同的交通流量提供最佳的服务,而不是试图区分流量并为某些流量提供更高水平的服务。DIFFSERV试图通过区分交通流量来在现有的最佳努力环境中提供改进的服务水平。例如,DIFFSERV将减少包含语音或流视频的流量的延迟,同时为包含文件传输的流量提供最佳的努力服务。数据包由网络寄宿生的DIFFSERV设备标记,并提供有关其所需服务水平的信息。网络中的其他节点阅读此信息并进行相应的响应以提供所需的服务级别。
什么是Intserv?
为提供QoS netw IntServ是另一个模型orks. IntServ is based on building a virtual circuit in the internet using the bandwidth reservation technique. Requests for reserving the bandwidth come from the applications that require some kind of level of service. According to this model, each router in the network has to implement IntServ and each application that requires a service guarantee has to make a reservation. When bandwidth is reserved for a certain application, it cannot be reassigned for another application. Routers between the sender and the receiver determine whether they can support the reservation made by the application. If they cannot support it, they notify the receiver. Else they have to route the traffic to the receiver. Therefore, in this method, routers remember the properties of the traffic flow and also supervise it. The task of reserving paths would be very tedious in a busy network such as the Internet.
DiffServ和Intserv之间有什么区别?
DIFFSERV是通过区分流量来提供Internet中QoS的模型,而Intserv是通过使用带宽预订技术在Internet中构建虚拟电路来提供网络中QoS的模型。DIFFSERV不需要网络中的节点来记住有关该流程的任何状态信息,而不是Intserv,该信息记得路由器中的状态信息。此外,在繁忙的网络(例如Internet)中保留路径并记住状态信息将是一项繁琐的任务。因此,在互联网上实施Intserv实际上将很难。因此,Intserv适合较小的私人网络,而DiffServ非常适合Internet。
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