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英语翻译1 Therefore,in most large star networks ,backup systems

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英语翻译
1 Therefore,in most large star networks ,backup systems are available in case the primary system fails.
2 A communication channel is the facility by which data is transmitted between locations in a computer network.
3 The major advantages of these hair-like fibers over wire cables include substantial weight and size savings and increased speed of transmission.
4 Most importantly,the OSI reference model is a framework that you can use to understand how information travels throughout a network.
5 It prevents changer in one layer from affecting he other layers,so that they can develop more quickly.
6 The problem of moving information between computers is divided into seven smaller and more manageable problems in the OSI reference model.
7 Each individual OSI layer has a set of functions that it must perform in order for data packets to travel from a source to a destination on a network.
8 The application layer establishes the availability of intended communication partners,
9 synchronizes and establishes agreement on procedures for error recovery and control of data integrity.
10 Whereas the application,presentation,and session layers are concerned with application issues,the lower four layers are concerned with data transport issues.
11 The purpose of a repeater is regenerate and retime network signals at the bit level to allow them to travel a longer distance on the media.
12 What really defines a bridge is its layer 2 filtering of frames and how this is actually accomplished.
13 The difference between the hub and switch is that switches make decisions based on MAC addresses and hubs don’tmake decisions at all.
14 The purpose of a switch is to concentrate connectivity,while making data transmission more efficient.
15 The physical topologies that are commonly used are the bus,ring.Star ,Extended star,Hierarchical,and mesh.
16 A hierarchical topology is created similar to an extended star.But instead of linking the hubs/switches together,the system is linked to a computer that controls the traffic on the topology.
17 There is no order the stations follow to use the network.It is first come ,first serve.This is the way that Ethernet works.
18 The TCP/IP reference model and the TCP/IP protocol stack make data communication possible between any two computers ,anywhere in the world,at nearly the speed of light.
19 The TCP/IP combines all application-related issues into one layer,and assures this data is properly packaged for the next layer.
20 IP serves as a universal protocol that allows any computer,anywhere,to communicate at any time.
能翻译的比较准确的帮下忙啊....1楼的翻译有些问题...
1因此,在大多数大型明星网络,备份系统的情况下可用的主系统出现故障.
二是一个沟通的渠道,其中地点之间传送数据在计算机网络设施.
3超过电线电缆的这些头发状纤维的主要优势包括大量的重量和体积增加储蓄和传输速度.
4最重要的是,OSI参考模型是一个框架,你可以用它来了解信息通过网络传播.
五是防止在一层换他从其他层的影响,使他们能够更快地发展.
6移动计算机之间的信息的问题分为在OSI参考模型七个小,更易于管理的问题.
OSI的7层,每个人有一个功能,它必须在执行命令的数据包从一个源旅游网络上的一个目标集.
8应用层确立了旨在沟通合作伙伴提供,
9同步并建立对错误恢复和数据完整性控制程序达成协议.
10鉴于申请,演示和会话层与应用程序问题而言,较低的4层与数据传输问题的关注.
11一个再生中继器的目的,是位水平,并在网络信号的回复时间,让他们对媒体的旅行较长的距离.
12什么是真正定义了一个桥梁的第2层帧过滤和这实际上是如何完成的.
13集线器之间的区别是,交换机和交换机的MAC地址和作出的决定don'tmake集线器在所有决定.
14一个开关的目的是集中力量连接,同时使数据传输更有效率.
15是常用的物理拓扑结构是总线,环.明星,明星扩展,层次和网状.
16创建一个分层拓扑结构类似于一个扩展的明星.但与其挂钩的集线器/交换机一起,该系统是连接到计算机上的拓扑控制交通.
17没有命令站遵循使用网络.这是先到先服务.这是以太网的方式运作.
18的TCP / IP参考模型和TCP / IP协议栈进行数据通信的两台计算机之间的任何可能,在世界任何地方,以接近光速的速度.
19的TCP / IP层合并为一的所有应用程序相关的问题,并确保这些数据是正确的下一层包装.
20个IP作为一个普遍的协议,允许任何一台电脑,任何地点,任何时间进行交流.