data-link layer

The Implementation of Net-Charging Based on Data-Link Layer

基于数据链路层的网络计费的实现

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We add the function of the per interface label space based on the source code, which enables to extend the LDP implementation to systems in which the data-link layer is ATM or FR.

我们在原实现基础上添加了每端口标记空间功能，使LDP实现可以向数据链路层为ATM或者帧中继的系统扩展。

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It is an extension of Hash-based IP traceback, adds two components in SPIE, and combines traceback technology on network layer and data-link layer.

提出一种数据链路层追踪方法，它对基于哈希的IP追踪技术进行了扩展，在SPIE结构中增加两个组件，将网络层和数据链路层的追踪技术相结合。

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Analysis of Data-Link Layer Protocol of 3~+ Network System

3~+网络系统数据链路层协议的分析

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In the database access layer in the application of a simple abstract factory pattern to meet the business logic needs access to the data source.

在数据库访问层中应用了具有简单抽象工厂模式，以满足业务逻辑层对数据源的访问需求。

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The Implementation of Flow-Stat LAN Based on Data-Link Layer

基于数据链路层的局域网流量统计的实现

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All application layer data are forced to be filtered by proxy when transparent proxy is working and the process seems transparent for users.

它的引入可以对出入防火墙的应用层数据进行强制过滤，这一过程是对用户透明的。

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Combined. NET Reflection with abstract factory pattern in the design and implementation of data access layer.

在数据访问层的设计和实现中，将.NET的反射技术和抽象工厂模式相结合，进一步提高了系统的可扩展性和易维护性。

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Some unique difficulties of data-link layer topology discovery make it fall behind the research of layer-3 network automatic topology discovery.

一些特有的困难使得数据链路层拓扑发现研究远远滞后于网络层拓扑发现，因而，也成为近些年来网络自动拓扑发现方面的一个研究热点和难点。

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Pay attention to discovering of data-link layer equipments and hosts for small networks, and then attention to network layer for large networks as well as discover routers and subnets.

小型网络重视链路层设备和主机的发现，而大型网络侧重网络层以发现路由器与子网。

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Based on the observed data of the contact cracks at the crown and abutment of the reinforcement and using the theories of structural mechanics, layer finite element, hydraulic structure and mathematical statistics, the actual working state of the contact cracks is studied.

本文根据佛子岭连拱坝加强拱的拱冠拱端接触缝的实测资料，应用结构力学、夹层有限元、水工专业和数理统计等有关理论，研究分析了加强拱接触缝的实际工作状态。

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Physical layer bandwidth of the data link is 1 056 Mbit/ s. Sustained throughput of 545 Mbit/ s was achieved at the data-link layer. The application layer throughput was 300 Mbit/ s.

链路物理层带宽达1056Mbit/s，链路稳定传输带宽为545Mbit/s，在应用层可得到300Mbit/s的数据传输率。

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The data-link layer topology discovery becomes an indispensable part of a network automatic topology discovery system.

数据链路层拓扑发现也因此成为一个网络自动拓扑发现系统不可缺少的部分。

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The six layers are: wireless physical layer, wireless data-link layer, network layer, transport layer, mobile computing application supporting Environment, and application layer.

六个层次是：无线物理层、无线数据链路层、无线网络层、无线传输层、移动计算应用支撑环境和移动应用层。

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Therefore, a datagram receiver is designed for the monitor and categorization of any datagrams transfering in the fieldbus based on the Profibus data-link layer protocol.

因此在分析Profibus链路层协议的基础上，设计了一种基于CPLD的可随时监测总线上传输的报文并将其分类的Profibus-DP报文接收器。

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Industrial communication networks-Fieldbus specifications-Part 3-4 : Data-link layer service definition-Type 4 elements.

工业通信网络 — 场总线规范 --- 第3-4部分: 数据联络层服务定义---4类要素.

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In this paper, use the radiative and sonde data obtained in December 1990 at Lanzhou University and at the top of the South-mountain which is 625 m high to analyse and calculate the radiative effects of the smog layer.

利用1990年11月兰州大学和离城市地面625m高南山顶的辐射和探空资料，分析和计算了烟雾层的辐射效应。

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Research on TCP/ IP Security Strategy Model Base on Data-link Layer

基于链路层的TCP/IP安全策略模型研究

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The hardware design and the software realization of data-link layer control protocol of ALE are mainly discussed.

主要讨论了短波调制解调器硬件平台各个模块的设计与系统数据链路层ALE控制协议的软件实现。

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HART Protocol is an important reasoning of HART telecommunication realized by temperature transmitter. At first, the thesis gave a comprehensive analysis of HART Protocol Standard, and introduced each request of the data-link layer, application layer and physics layer.

HART协议作为温度变送器实现HART通信的重要依据，论文首先对HART协议规范作了全面的分析，介绍了HART数据链路层、应用层和物理层具体要求。

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Further more, the paper discusses the discovery method of the Data-link layer equipments, such as switches or bridges, based on the analysis of their work principle.

并且在对数据链路层网络设备（交换机、网桥等）的工作原理进行分析的基础上，进一步讨论了该层网络设备的发现方法。

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