To keep from packet looping in network, a hop count field is used in the header of packet. 6. A PRN operating system is developed under the radio platform. First, we analyzed the source code of NOS, which is developed according to TCP/IP.
在无线实验平台的基础上，进行了对现有以TCP/IP为标准开发的网络操作系统NOS的源程序的分析和研究，实现了PRN协议层和IP协议层随接口的研究和实现。
At last, on the basis of the practical example of LIANYUAN S control network and data network integration technology, this paper brings up a new monitoring and control system construction frame that based embedded TCP/IP protocol, taking use of the technology of embedded network. Also in this paper, designs and implements it with the use of related technologies of hardware and software, and discusses and implements the three main questions: the design of the front equipment of collecting; the managing and scheduling technology of the multi communication threads in communicating module of monitoring and control system; the data processing.
本文最后以链源钢铁厂一个实际的监控网络和数据网络一体化的项目要求为例，提出了在该系统中引入嵌入式网络技术，并由此设计了一种基于Internet／Intranet的嵌入式的企业监控网络和数据网络的体系结构框架，利用有关的硬件与软件技术，进行了设计与开发实现，并对基于Internet／Intranet嵌入式监控系统的三个核心问题：基于嵌入式TCP／IP协议的采集前端设备的系统设计，通讯模块中多通讯线程的管理与调度以及数据的处理进行了探讨与实现。
UDP data grams are used to initialize the transmission process and check the link state, while TCP to transmit information in normal connection states.
由于IEC 103规约主要考虑信息交换数据格式的统一[1-3]，不同国家、不同厂家有不同的具体实现方式，有的采用串口，有的采用以太网TCP/IP，有的采用以太网UDP/IP。
At first this paper introduces the basic knowledge of the standard TCP/IP protocol and analyzes its function.
本文首先介绍了相关TCP／IP协议的基础知识，对标准TCP／IP协议的功能进行了分析。
Firstly, the paper introduces technologys relating to the topic, and gives a thorougly overview of network hacking methods and defending ways; then analyses the application mechanism of SED firewall抯 TCP/IP protocol suite; and e~cpatiates at length on the ideas and methods of how to design and implement a packet filter after discussing these basic topic.
首先，本文陈述了相关技术基础，着重分析了常见网络攻击手段和防范方法；然后，深入地讨论和分析了SED FW-2000防火墙TCP/IP协议栈的实现细节；最后，在了解这些相关技术的基础上，详细阐述了包过滤器设计和实现的思想和方法。
By the end of 1994, the first domestic use of the TCP/IP protocol public computer network.
1994年底，国内第一个采用TCP/IP协议的公共计算机网。
Nagle's algorithm works by coalescing a number of small outgoing messages, and sending them all at once.
Nagle的算法通常会在TCP程序里添加两行代码，在未确认数据发送的时候让发送器把数据送到缓存里。
Nagle's algorithm, named after John Nagle, is a means of improving the efficiency of TCP/IP networks by reducing the number of packets that need to be sent over the network.
Nagle算法于1984年定义为福特航空和通信公司IP/TCP拥塞控制方法，这是福特经营的最早的专用TCP/IP 网络减少拥塞控制，从那以后这一方法得到了广泛应用。
this paper makes the gas remote monitor network as background to do some research on the qos guarantee of the network. qos is a synthesis guide line which can be used to estimate the degree to satisfy with some server, which is a technology to solve the problem of delay and congestion in network. it must integrate multi-qos mechanism to get good qos guarantee in the practical application. three qos models in the ip net application and homologized affective factors are demonstrated. meanwhile, the field of qos protection strategy arrangement in shaanxi coal mine gas network has been picked up as the example. for this situation, the comparison to the different qos models is doing strictly. by combining the tcp congestion control arithmetic with ip congestion control arithmetic, the paper also emphatically describes the corresponded arithmetic model for that. stimulatingly, it is promoted the qos characteristic over-area effectively, which it is based on the original single congestion control.
摘 要：以陕西煤矿瓦斯监测远程联网为背景，研究其联网网络的qos保障策略实现。由于现有的各种qos实现机制无法单独为陕西煤矿瓦斯监测联网网络的qos提供保障，因此在实际应用中必须结合多种机制才能得到较好的qos保障效果。比较了传统ip网络的qos结构体系，通过分析intserv和diffserv两种模型的基本原理、工作方式，并指出其各自的优缺点和网络应用环境，设计了将rsvp协议与diffserv模型相结合来满足瓦斯监测数据传输实时性的要求；针对陕西煤矿瓦斯联网的特性，提出了将tcp拥塞控制算法与ip层拥塞控制算法相结合的算法模型，并且该模型的应用可以在原有单一拥塞控制的基础上有效地提升跨地区网络的qos特性。
Finally, explains briefly the following task. Embedded Multiply Port Modbus Server acts as the middle tier business platform—could supervisory and control the various types of field control devices through 8 RS422/RS485 buses, provide standard Modbus protocol based on TCP/IP, accomplishes the ESP SCADA system with remote control and independent of distance. At the same time, acts as the agency of field control level and DCS system, makes the various types of field control devices integrate with DCS system through standard industrial protocol. So, eMPMS extends the application range and flexibility of the ESP SCADA system, accelerate the efficiency of the ESP system, and plays a positive role in environment protection and the decrease of power plant`s dust emission.
嵌入式多口Modbus服务器eMPMS作为电除尘SCADA系统的中间层业务支撑平台——能够并行监控多条Rs422/485总线的现场控制设备，为现场控制设备提供标准的基于TCP/IP的Modbus协议，实现了电除尘SCADA系统远程控制的距离无关性；同时作为现场控制层与DCS系统的中介，使已在现场应用的大量控制设备，能通过标准的工业协议，实现与DCS系统的集成；从而大大扩展了电除尘SCADA系统的灵活性和应用范围，促进了电除尘系统的高效运行，为减低电厂粉尘排放和环境保护起到积极作用。
One management center will connect several 485 buses with each having 16 controllers connected but unlimited by TCP/IP, each controller will connect and control 64 doors.
每个控制器可控制64道门，每道门连接一个单门模块、读卡器、门磁、开门按钮、门锁和报警装置。
According to the connotation of DCPA and TCPA concepts, the concepts of SCR and TCP are proposed and the models are established separately.
提出了空间碰撞危险度和时间碰撞危险度的概念，建立了多因素的动态碰撞危险度模型。
Socket receive buffer, and to set the size of the tcp receive windowthat is advertized to the remote peer.
so_rcvbuf的值用来设置内部套接字接收缓冲区和通知给远端对方的tcp接收窗口的大小。
The detailed analysis of data packet in TCP/IP protocol suite is given out. On the basis of it, a layered protocol analysis module is designed and realized in this paper.
3论文对TCP/IP协议中数据封装的过程进行了详细的分析，并在此基础上设计和实现了一个分层的协议分析模块。
Data between upper software and central controller is transmitted in keeping to TCP/IP protocol.
上层软件和中央控制器的传输遵循TCP/IP协议。
Up to three may be specified#nameserver1 = 208.23.14.2#nameserver2 = 63.93.12.3#nameserver3 = 208.23.14.4# This section applies only to Windows.
如果你选择 NAT，虚拟机可以使用许多标准的 TCP/IP 协议连接到外部网络上的其他机器。
The system uses TCP/IP to communicate data between master PC and PLC by OPC mode.
该系统上位机与PLC通过TCP/IP以O PC方式交换数据，并借助视频监控系统实现了设备现场无人值守。
It is necessary to implement a TCP/IP protocol stack to complete communications of embedded Internet.
为了完成嵌入式Internet的通信，一个可实现的TCP/IP协议栈是必须的。
Source code for the development of the TCP/IP protocol stack users with a great reference value.
源码，对于开发TCP/IP协议栈的用户具有非常大的参考价值。
By the end of this section of the tutorial, our finger server will answer TCP finger requests on port 1079, and will read data from the web.
在本章的结尾，我们的finger服务器会在1079端口响应TCP的finger请求，并且从web上读取数据。