应用RFoG技术进行有线电视网络双向改造

RFoG技术是一种利用PON网络架构来实现HFC网络光纤推进的一种技术。本文介绍了RFoG技术及其在双向网络改造中的应用方案,分析了RFoG技术相对于传统HFC网络的优缺点,并提出了利用RFoG技术实现网络双向化改造的方案。     

计算机网络安全与防火墙技术

防火墙技术的核心思想是在不安全的网际网环境中构造一个相对安全的子网环境。本文介绍了防火墙技术的基本概念和系统结构,讨论了实现防火墙的两种主要技术手段：一种是基于分组过滤技术（Packetfiltering）,它的代表是在筛选路由器上实现的防火墙功能;一种是基于代理技术（Proxy）,它的代表是在应用层网关上实现的防火墙功能。     

高性能查询分页技术的研究与应用

查询分页技术是web应用系统中的一种常用技术。为了在实现查询分页功能时兼顾系统性能,文中通过对传统查询分页技术的分析,结合两种传统查询分页技术的优点,提出了一种高性能的查询分页技术,并给出了具体的实现方法。     

一种网络入侵预防系统NIPS的设计

入侵预防系统是近两年新兴起的一种网络安全技术。它比防火墙和入侵检测系统具有更高的主动性,具备一定程度的智能性,能够保护计算机网络系统免受未知类型的攻击。本文介绍了一种NIPS系统的设计与实现。本系统主要考虑了两大基础检测技术的实现:深度内容搜索技术和行为分析技术,这两项技术实现了IPS的基础同时也是主体的检测功能,其它检测技术的实现大多要建立在这两项技术基础之上。     

多格式共存的多媒体课件库的设计与实现

多媒体课件库是实现数字化教与学的基础.探索一种基于B/S结构的多格式共存的多媒体课件库的设计与实现方法,提出了系统结构模型、系统数据流框架和主要功能模块的设计,针对每一种格式的多媒体课件,探讨了课件的存储、管理、应用、下载等技术实现方法,并重点解析了几种关键的实现技术,如流媒体技术、虚拟光驱技术和数据库处理技术等.     

VPN实现技术研究

VPN是TCP／IP网络架构下实现网络安全的一种新技术。基于IPSec的VPN实现技术是目前最主要的一种。文章对IPSec技术的体系结构及组成部分进行了研究。讨论了如何用SPec实现VPN，并且给出了一个设计与实现方案。     

防火墙流过滤技术的分析与研究

流过滤技术是对包过滤、状态检测及应用代理的一种“融合”,实现了高性能、可扩展、透明的对应用层协议的保护。分析了流过滤技术的基本原理以及实现原理,并对流过滤技术和其他防火墙技术进行了比较;详细研究了流过滤的实现过程,针对流过滤技术实现过程中的大量TCP报文重组问题,提出了一种解决方案;最后指出流过滤防火墙并不是完全透明的以及进一步研究的方向。     

MVC模式下一种高效分页方法的研究与实现

查询分页技术在Web应用中是一种通用的技术。为了在实现查询分页功能时兼顾系统性能,文中通过对传统查询分页技术的分析,结合在MVC模式下开发Web应用的特点,提出了一种高性能的查询分页技术并给出了具体的实现方法。     

存储系统中的Snapshot技术研究

该文对存储系统中的Snapshot技术进行了探讨。Snapshot技术是存储系统和文件系统备份的一种重要技术,使用该技术能够实现快速的联机数据备份。Snapshot有Copy-on-Write和Split-Mirror两种实现方式,除了备份以外,Snap-shot技术还可以应用于其它领域。     

LonWorks现场总线与以太网的互联研究

本介绍了ＬｏｎＷｏｒｋｓ现场总线与以太网的两种互联方案,一种是半导体制造商使用大规模集成电路技术实现的片内集成方案,另一种是应用开发使用嵌入式设计技术实现的片外集成方案。本对两种方案作了说明和比较,并指出了其应用前景。     

IP Over ATM与IP Over SDH/SONET技术

首先对当今IPOverATM技术采用的设计方案（局域网仿真，IP交换，标签交换）进行了详细的分析与比较，然后在总体上将IPOverATM与IPOverSDH/SONET技术进行了比较。     

A roadmap of fuzzy logic in ATM,mobile and active networks: challenges of the new century

 ATM networking technology was conceived 20 years ago, and installations will reach their peak the next 10 years. Active networks will be the technology which will follow the ATM. In this article, we address the most important issues regarding recent advances and future perspectives in ATM, including IP/ATM integration, Active Networks, MobileActive Networks and the impact of fuzzy technology in solving the important problems of the above future networking technologies. In the new century it is imperative that we shift from a technology to an application (needs of consumers) focus, where ubiquitous and invisible (context-aware) computing will be a reality.     

帧中继、ATM及其互连技术

帧中继技术是一种成熟的高速分组交换技术，而ATM技术则是未来高速网络发展的方向。文中介绍了帧中继、ATM技术的基本概念，对两者进行了讨论比较，并着重分析了两者之间互连的实现技术和方法。     

The impact of ATM on security in the data network

Asynchronous Transfer Mode (ATM) has been under development in laboratories since the early 1980s and although considered as a new technology is basically a technology that is coming of age. The fit between the capability's deliverable by this technology and the needs of data networks today has prompted this coming of age. Unlike some technologies in the past, ATM is truly a response to the data networking needs of today and the future. It is this fit between customer requirements and the capabilities of ATM that assures the future of this technology.     

Are ATM, Gigabit Ethernet ready for prime time

ATM and Gigabit Ethernet, the subjects of intense speculation by industry observers and potential users of the technologies, appear as if they may be ready to begin competing for their place in the networking sun. The demand for both technologies is being caused by the increasing adoption of Internet and intranet technology and the growing number of bandwidth-hungry applications. These factors make it necessary to move an increasing amount of data at faster rates over networks. Enterprises are thus beginning to adopt ATM and Gigabit Ethernet. In some cases, the two technologies are replacing FDDI backbones because they can be less expensive and provide higher speeds. In addition, ATM has quality of service features, while Gigabit Ethernet can provide seamless connectivity throughout LANs that already use Ethernet technology. Both technologies provide LAN services, such as scalable campus backbones, load sharing, and connections to WAN services. ATM has been available longer and is being deployed where high bandwidth performance is required. ATM and Gigabit Ethernet involve a variety of complex issues that will, in part, determine whether and how users adopt either or both technologies     

The great networking correction: frames reaffirmed

The paper considers how frame-based network technologies of local area networks are retaking their role as the primary campus technology, providing connections from desktop through backbone. This development comes at the expense of cell-based ATM, which was widely viewed as the inevitable, and highly desirable, next wave in transport technologies. ATM had been expected to supplant LAN-based transport and allow data, voice, and video to converge on a single, multi-transmission rate network. That ATM will become the dominant campus transport technology, however, seems less and less likely. Technical benefits once unique to ATM have become fewer with recent advances in both Ethernet and token ring technologies. As a result, monetary investment in ATM technology has fallen off sharply. ATM technology will likely become less visible as fewer servers and high-end workstations use it for direct connections. It will, of course, continue to provide robust switch-to-switch connections in some campus backbones. It may thrive in the carrier space, where its scalability, support for multiple traffic types, and circuit-based paradigm can be put to good use     

无线网络中实现ATM的关键技术

无线ATM是异步转移模式(ATM)技术和移动通信技术发展的产物。ATM传输和交换以宽带、低误码率和高传输速率的传输介质为前提,可以提供多媒体服务和广泛的信息接入。而无线信道的传输特点是带宽受限、信道传输质量差和传输误码率高。文中首先介绍无线ATM的一般概念,其次说明在无线网络中实现ATM技术的关键问题及其解决方法,最后介绍无线ATM的网络协议。     

An Interactive Telelecture System with Hybrid ATM/IP Networking

Currently, there is much debate whether ATM (Asynchronous Transfer Mode) or IP (Internet Protocol) is the better internetworking technology for multiparty multimedia applications. Proponents of ATM argue that only a connection-oriented network can satisfy the stringent timeliness requirements of high-quality audio and video data. Proponents of the Internet emphasize the scalability and flexibility of connectionless networking. In this paper a multiparty multimedia telelecture system, called Distance Learning Controller (DLC), is presented that uses both ATM and IP, thus, attempting to exploit the advantages of both technologies, without suffering the drawbacks of either technology. The DLC system uses ATM for transmission of broadcast-quality video and CD-quality audio, and IP-over-ATM for low-bandwidth applications and conference control functions. This paper describes the hardware and software components of the DLC system.     

多协议标记交换技术的研究进展

ＭＰＬＳ作为一种新的ＩＰ与ＡＴＭ综合的技术正在快速发展。本文简要回顾了ＭＰＬＳ的发展过程,介绍了ＭＰＬＳ的总体框架,最后论述了ＭＰＬＳ目前急需解决的关键技术。     

RFID技术与条码技术兼容的图书ATM机研制

论述了兼容RFID技术与条码技术的图书ATM的设计研究,阐述了主要图书ATM应用技术的特性,介绍了所开发系统的技术方案、技术结构及其功能特点,为高校图书馆逐步引进RFID技术提供借鉴。