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开题报告

毕业论文(设计)开题报告

(含文献综述、外文翻译)

题 目

姓 名

学 号

分院(系) 信息科学与工程分院

专业班级

指导教师

完成时间 2006年3月10日

宁波理工学院

文献综述内容

参考文献

[1]杰瑞《无线网络连接技术》。基础学堂Know-how. 2005年。

[2]《802.11协议族简介总结整理》2006年1月6日。

[3]https://www.sodocs.net/doc/336566445.html,/CMS/Pub/network/network_protocal/2006_01_06_10444.ht m

[4]崔海游《无线网络,何时能普及?》CHIP 2005年第5期。

[5]卞智玲《无线局域网技术分析》福建电脑2005年第9期

开题报告内容

第1节项目意义

在这个“网络就是计算机”的时代,伴随着有线网络的广泛应用,以快捷高效、组网灵活为优势的无线网络技术也在飞速发展。无线局域网是计算机网络与无线通信技术结合的产物,

第2节研究的内容

WLAN的应用有以下两类情况:

第3节研究方法

室内WLAN实用分析和考虑因素

现场示例

1

的最大覆盖,所需接入点较少,屋顶布线。

4.仓库设计

WLAN可使管理员在需要时携带笔记本电脑到达仓库,实现与网络无线连接。查询产品订购,包括发运情况及库存信息,只需较少布线投资,提高设备利用率。

仓库设计1:布线仅限于墙壁,墙角接插天线。

图4 仓库设计实例1

仓库设计2:在这个建筑物中,原有布线仅能从一面墙提供,因此,可采用波道式

天线和覆盖墙壁的双级

第4节拟解决的问题

以下给出了在安全方面最为常见的疏忽以及如何避免的方法:

1、不要破坏自己的防火墙

2、不要小看介质访问控制

3、不要忽略WEP

4、禁止未经认证的访问接入点

5、拒绝笔记本ad-hoc方式接入

参考文献

[1]杰瑞《无线网络连接技术》。基础学堂Know-how. 2005年。

[2]《802.11协议族简介总结整理》2006年1月6日。

外文翻译稿

CISCO 统一的无线网络

外文原稿

CISCO UNIFIED WIRELESS NETWORK

As users become increasingly mobile and business applications become more interactive, innovative wireless services and applications are critical in helping companies maintain agility and differentiation. Cisco Systems? addresses the need for enterprise-class wireless connectivity with the Cisco? Unified Wireless Network. This unified wired and wireless solution delivers the industry's best wireless LAN security, innovation, and investment protection. The Cisco Unified Wireless Network supports real-time business-critical applications and creates a secure, mobile, interactive workplace

for organizations deploying WLANs. This document introduces the products, features, benefits, and future migration plans of the Cisco Unified Wireless Network.

CHALLENGE

A worldwide revolution is occurring in business. Wi-Fi enabled notebook computers are proliferating and driving the adoption of enterprise wireless LANs (WLANs). Unlike past technology advancements that were driven by technology professionals, the explosion of enterprise WLANs is being driven by mobile users, traveling executives, wireless applications, and advanced services like voice over IP (VoIP) over Wi-Fi. The acceleration of enterprise adoption of WLAN technology is radically transforming business operations, the network edge, data centers, and centralized IT control.

Today's business climate requires anywhere, anytime connectivity. Mobility changes the way organizations do business. Real-time interaction, instant messaging, text paging, voice services, network access while traveling, and real-time network access in the office are transforming the business environment. In an increasingly competitive business environment, companies need fast responses and want immediate results. WLANs are now business-critical. End users are embracing the freedom and flexibility of wireless connectivity, and business executives are recognizing the competitive advantage of business-critical mobile applications. Organizations are deploying WLANs

to increase employee productivity, enhance collaboration, and improve responsiveness to customers.

The increasing need for anytime connectivity is creating new challenges for today's networking professionals, who must respond to the growing demand for WLANs in an era of tight budgets and reduced resources. These networking professionals are discovering that in the absence of a corporate sanctioned wireless network, employees are deploying their own unauthorized access points that put the entire network at risk. Network managers need to protect their networks and deliver secure WLAN access for their organizations. They need a wireless infrastructure that embraces the unique attributes of radio frequency (RF) technology and effectively supports today's business applications. They need to keep their wired network secure while laying a foundation for the smooth integration of new applications that embrace wireless technology. Network managers need a WLAN solution that takes full advantage of existing tools, knowledge, and network resources to cost-effectively address critical WLAN security, deployment, and control issues.

SOLUTION

The Cisco Unified Wireless Network is the industry's only unified wired and wireless solution to cost-effectively address the WLAN security, deployment, management, and control issues facing enterprises. This powerful solution combines the best elements of wireless and wired networking to deliver scalable, manageable, and secure WLANs with a low total cost of ownership. It includes innovative RF capabilities that enable real-time access to core business applications and provides proven enterprise-class secure connectivity. The Cisco Unified Wireless Network delivers the same level of security, scalability, reliability, ease of deployment, and management for wireless LANs that organizations expect from their wired LANs.

The Cisco Unified Wireless Network is an integrated end-to-end solution that addresses all layers of the WLAN, from client devices and access points, to the network infrastructure, to network management, to the delivery of advanced wireless services integration and award-winning, worldwide, 24-hour product support. It delivers the

industry's best wireless LAN security, innovation, and investment protection. It is the only solution to integrate innovative access point technology with an award-winning centralized management system, intelligent control, real-time location services and a wide array of interoperable Cisco Compatible client devices.

The Cisco Unified Wireless Network helps reduce overall operational expenses by simplifying network deployment, operations, and management. With this solution, several, hundreds, or thousands of central or remotely located access points can be easily managed from a centralized management console. The flexibility of the Cisco Unified Wireless Network allows network managers to design networks to meet their specific needs, whether implementing highly integrated network designs or simple overlay networks.

Building Enterprise-Class Wireless LANs

The Cisco Unified Wireless Network is deployable in corporate offices, hospitals, retail stores, manufacturing floors, warehouse environments, educational institutions, financial institutions, local and national government organizations, and other locations worldwide. It supports Wi-Fi enabled business applications for a variety of uses, including mobile healthcare, inventory management, retail point-of-sale, video surveillance, real-time data access, asset tracking, and network visibility.

The Cisco Unified Wireless Network enables on-the-road access from venues such as public hotspots, hotels, convention centers, and airports for mobile users and traveling executives. It delivers real-time access to a variety of business environments, providing secure mobility and guest access for campus and branch offices. Customers can confidently deploy the Cisco Unified Wireless Network knowing that their investment is protected.

Cisco Unified Wireless Network Elements

The Cisco Unified Wireless Network is composed of five interconnected elements that work together to deliver a unified enterprise-class wireless solution. The five interconnected elements are client devices, a mobility platform, network unification,

world-class network management, and unified advanced services. Beginning with a base of client devices, each element adds capabilities as network needs evolve and grow, interconnecting with the elements above and below it to create a comprehensive, secure WLAN solution (Figure 1). Cisco offers a wide range of WLAN products to support the five interconnecting elements of the Cisco Unified Wireless Network (Figure 2).

Figure 1. Cisco Unified Wireless Network Elements Work Together to Deliver a Unified Enterprise-Class Wireless Solution

Figure 2. Cisco Unified Wireless Network Product Portfolio

The Cisco Unified Wireless Network is an industry-leading, comprehensive solution that encompasses client devices, access points, controllers, switches and routers, world-class management, and advanced services with enterprise-class support. It provides solid investment protection via a robust product portfolio, unified architecture, smooth migration path to future enhancements, and extensive technology migration programs.

It supports real-time business-critical applications and creates a secure, mobile, interactive workplace for organizations deploying WLANs.

Cisco Unified Wireless Network Deployment

The five elements of the Cisco Unified Wireless Network are fundamental to building secure, successful enterprise-class WLANs. Customers can select the Cisco Unified Wireless Network elements and products that best meet their wireless networking needs. Customers can begin with client devices and a mobility platform of autonomous or lightweight access points and then add additional elements as their wireless networking requirements grow.

The Cisco solution is services-oriented. In addition to full 802.11a/b/g wireless support, it includes immediate support for advanced services like voice, intrusion prevention system (IPS), Network Admission Control (NAC), Cisco Self-Defending Network, dynamic RF management, high-resolution location services, and guest access. These advanced services are built-in and ready for immediate implementation or can be deployed over time via a phased integration. Customers decide when and how to implement these advanced services based on their organizational timelines and requirements.

Details about each element of the Cisco Unified Wireless Network are listed below.

Client Devices

More than 95 percent of today's notebooks are Wi-Fi enabled, and a diverse array of specialized Wi-Fi client devices are now available for industry-specific applications. To address enterprise WLAN needs, client devices must interoperate securely with leading

WLAN infrastructures and must consistently provide the features that organizations require.

Cisco Compatible and Cisco Aironet Client Devices-Cisco Compatible client devices or Cisco Aironet client devices are strongly recommended for the Cisco Unified Wireless Network. With more than 90 percent of shipping client devices certified as Cisco Compatible, almost any client device that is selected will support Cisco's powerful advanced features.

By providing third party tested compatibility, the Cisco Compatible Extensions program helps to ensure the widespread availability of client devices from a variety of suppliers that are interoperable with a Cisco WLAN infrastructure. More than 300 wireless devices are Cisco Compatible certified today (with more being added all the time). More than 90 percent of today's notebooks are Cisco Compatible certified.

Cisco shows its commitment to leading innovation by providing pre-standard features through the Cisco Compatible Extensions program to fulfill customer's diverse enterprise application requirements. Cisco enables its partners to provide software upgrades for Cisco Compatible mobile devices to help ensure investment protection and a migration path to future industry standards and to future Cisco WLAN infrastructure features. IT managers can confidently deploy their WLANs, even if they serve different client device types, when Cisco Compatible client devices are used.

No other WLAN vendor has the ability to take advantage of tomorrow's enhancements today, providing the ability to confidently deploy robust, scalable, secure, and manageable solutions. With the Cisco Compatible Extensions program, Cisco is able to deliver next-generation WLAN features-today.

The Cisco Unified Wireless Network also supports Wi-Fi Certified or IEEE 802.11 clients, but Cisco Compatible or Cisco Aironet client devices are recommended for their innovative, advanced Cisco-verified features.

Network Unification

Integration of the wired and wireless network is critical for unified network control, scalability, security, and reliability. System wide wireless LAN functions, such as

security policies, intrusion prevention, RF management, QoS, and mobility must be available to support enterprise-class wireless applications. Smooth integration into existing enterprise networks must be readily supported.

Cisco Wireless LAN Controllers-Cisco's solution supports a network infrastructure that functions smoothly across a range of platforms. It delivers the same level of security, scalability, reliability, ease of deployment, and management for wireless LANs as wired LANs. It provides a solid migration path into all major Cisco switching and routing platforms via Cisco wireless LAN controllers. Cisco is the only vendor that delivers

a complete end-to-end solution that is unified and innovative, and that provides solid investment protection to help ensure a secure, mobile, interactive workplace for the wired and wireless network.

Today's wired and wireless unification occurs with the Cisco Catalyst 6500 Series Wireless Services Module (WiSM) and Cisco Wireless LAN Controller Module for Integrated Services Routers. Cisco WiSM provides unparalleled security, mobility, redundancy, and ease-of-use for business-critical wireless LANs. It is designed for medium-sized and large enterprise facilities with clustering capabilities of up to 3600 lightweight access points per roaming domain. It scales to 300 lightweight access points per module with support for 10,000+ wireless client devices. The Cisco Wireless LAN Controller module for Integrated Services Routers allows small-to-medium businesses and enterprises to cost-effectively deploy and manage secure wireless LAN's at branch offices. It manages up to six Cisco Aironet lightweight access points and is supported on Cisco 2800/3800 Series Integrated Services Routers and Cisco 3700 Series Integrated Services Routers. Cisco also offers two enterprise-class stand-alone wireless LAN controllers with the Cisco 4400 and 2000 Series. These stand alone controllers fully integrate with the network infrastructure to deliver enhanced security features, enforce QoS polices and deliver other advanced services. The capacity of these controllers ranges from six access points with the 2000 Series and up to 100 access points with the 4400 Series. These controllers can be clustered together to provide support for up to 2400 access points per roaming domain.

Cisco wireless LAN controllers are responsible for system wide wireless LAN functions, such as integrated IPS, real-time RF management, zero-touch deployment, and N+1 redundancy. These controllers work with lightweight access points and a management device to deliver enhanced performance and advanced management capabilities. Cisco wireless LAN controllers provide the control, scalability, security, and reliability that network managers need to build secure, enterprise-scale wireless networks-from branch offices, to small businesses, to main campuses.

Unified Advanced Services

A robust WLAN must support new mobility applications, emerging Wi-Fi technologies, and advanced threat detection and prevention capabilities. This support must be

cost-effective and easy to deploy and implement.

Cisco Unified Wireless Network Advanced Services-Cisco's solution delivers unified support of leading-edge applications. This support is built into Cisco's end-to-end solution-not an afterthought. Cisco's solution is services-oriented and includes a variety of advanced services that are ready for immediate implementation or deployment over time via a phased integration. Organizations can selectively deploy the services and applications they need based on their individual requirements. Cisco's advanced services are industry-leading, innovative, and comprehensive.

The Cisco Unified Wireless Network cost-effectively supports new mobility applications, emerging Wi-Fi technologies, and advanced threat detection and prevention capabilities. It supports advanced features such as wireless VoIP and location services, as well as advanced wireless security features such as NAC, the Cisco Self-Defending Network, and guest access.

? Wireless VoIP-Wireless VoIP allows organizations to provide cost-effective,

real-time voice services using their existing wireless infrastructure. The power of VoIP is delivered to the enterprise by the comprehensive voice communications

capabilities of the Cisco Wireless IP Phone 7920. This Wi-Fi phone supports

intelligent services such as security, mobility, QoS, and management, across an

end-to-end Cisco network.

? Location Services-High-resolution location services support critical applications such as high-value asset tracking, IT management, and location-based security.

Thousands of authorized and unauthorized active Wi-Fi devices can be tracked

simultaneously to within a few meters from directly within the WLAN infrastructure with the Cisco 2700 Series Wireless Location Appliance. This appliance brings the power of a cost-effective, high-resolution location solution to critical applications such as high-value asset tracking, IT management, and location-based security. This innovative device provides the ability to integrate tightly with a spectrum of

technology and application partners through a rich and open application

programming interface (API) to facilitate the deployment of new and important

business applications. Additionally, when Cisco's location services are combined with wireless VoIP, e911 emergency response capabilities are available.

? NAC-NAC is a set of technologies and solutions built on an industry initiative led by Cisco Systems. Cisco WLANs support NAC by using the network infrastructure to enforce security policy compliance on all wireless devices seeking to access

network computing resources, thereby limiting damage from emerging security

threats such as viruses, worms, and spyware. Cisco WLANs support both

NAC Appliance (Cisco Clean Access) and the NAC Framework.

? Cisco Self-Defending Network-The Cisco Self-Defending Network strategy is

Cisco's vision for integrated network security. It helps organizations identify,

prevent, and adapt to both known and unknown security threats. Cisco WLANs

integrate with the Cisco Self-Defending Network to provide end-to-end network security and identity-based networking.

? Guest Access-Guest access allows customers to keep their wireless networks secure while providing customers, vendors, and partners with controlled access to their

WLANs.

Cisco will continue to support and develop advanced services and features to empower customers with mobility solutions to solve business challenges, today and in to the future.

FEATURES

The Cisco Unified Wireless Network supports solid features and benefits through robust product capabilities. This powerful solution provides management centralization with control in the infrastructure.

? Security-A fundamental best practice of wireless LAN security is the ability to

secure and control the RF environment. Cisco leads the industry in delivering

enterprise-class RF security and WLAN security policy monitoring. Cisco wireless security features include:

–Controlled access to the WLAN via numerous authentication and encryption

policies, including 802.11i, Wi-Fi Protected Access (WPA), WPA2, and mobile VPNs

–WLAN IPS that detects and mitigates rogue access points, unassociated client

devices, and ad-hoc networks, and that provides customizable RF attack

signatures to protect against common wireless threats

–Secure management of infrastructure and RF-layer security boundaries

? Management-Cisco simplifies WLAN management by providing clear visibility and control of the RF environment. This increases network scalability, improves

troubleshooting, and enhances productivity for network administrators, resulting in lower operational expenditures. Cisco management features include:

–Simplified WLAN management and operations support that demystifies RF and

removes the complexity of managing the RF environment

–Real-time RF scanning, monitoring, and control integrated directly into the

WLAN infrastructure, delivering a self-configuring, self-optimizing, and

self-healing wireless network

–Simultaneous tracking of thousands of devices from directly within the WLAN

infrastructure using Cisco's patent-pending RF fingerprinting technology

–Advanced WLAN planning, deployment, and management tools

–Enhanced troubleshooting and diagnostic tools for proactive performance and fault monitoring, including graphical heat maps for easy analysis

–Centralized policy engines that enable system-level security and QoS policies to be easily configured and enforced

? Performance-WLAN coverage must be reliable and RF bandwidth must be optimized to help ensure maximum WLAN performance. Cisco achieves this via the following capabilities:

–QoS for voice and delay-sensitive applications, including over-the-air bandwidth contracts

–Real-time capacity management with load balancing

–High-capacity, versatile deployments in office locations or rugged environments, with support for a broad range of operating temperatures

–Self-healing WLANs for high availability, including coverage hole detection and correction

? Mobilit y-End users need uninterrupted network access when roaming across access points (within and between subnets). Cisco's WLAN solution delivers the following: –Secure Layer 2 and Layer 3 roaming

–"Follow-me VPNs," which enable clients to maintain VPN tunnels when roaming –Fast secure scalable roaming in 802.11i environments

–Context transfer of security and QoS policies, allowing users' identities to follow them as they roam

–Wireless without boundaries both indoors and outdoors including dynamic

wireless mesh networks

? Scalability-A wireless network must scale to meet current and future business requirements. Cisco provides:

–Support for WLAN deployment in the campus, branch offices, remote sites, and outdoor locations

–Support for deployment of several, hundreds, or thousands of central or remotely located access points

–WLAN resiliency, redundancy, and fault tolerance

? Integration-End-to-end wired and wireless network integration minimizes the total cost of ownership. Cisco minimizes the total cost of ownership for WLANs by

supporting:

–A unified wireless and wired infrastructure, delivering a single point of control

for all WLAN traffic

–Extension of rich, intelligent Cisco infrastructure device features to wireless

traffic such as QoS and management policies

–Support for several types of authentication, authorization, and accounting (AAA) servers

–Client integration with the Cisco Compatible Extensions program

–Easy migration of Cisco Aironet autonomous access points to run LWAPP

? Services/Applications-An enterprise-class WLAN must support numerous advanced services and applications that use the unique attributes of mobility. Cisco includes support for:

–Voice services through a software application or a handset device

–High-resolution location tracking for users and assets

–Guest access to enable customers, consultants, contractors, suppliers, and vendors –Application-specific devices (ASDs), such as those used in retail or

manufacturing environments

CISCO UNIFICATION, INNOVATION, AND INVESTMENT PROTECTION

As the worldwide WLAN technology leader and innovator, Cisco offers the industry's most comprehensive product line for enterprise WLANs. Cisco will continue to lead the acceleration and evolution of WLAN technology into the next generation of enterprise networking. Cisco will evolve the Cisco Unified Wireless Network to continue to

support new business applications, WLAN technology developments, and

enterprise-class network demands.

Cisco's technology unification, innovation, and investment protection will help ensure a secure, mobile, interactive workplace for organizations deploying WLANs. Cisco will help to ensure customer investment protection through field firmware upgrades, software upgrades, and careful attention to future hardware requirements. Future enhancements will include several deployment options, software enhancements, scalability features, security capabilities, hardware advancements, and wired + wireless integration. Customers can feel confident that with Cisco, their WLAN investments are protected both today and tomorrow.

CISCO WLAN FINANCING PROGRAM

Customers can add a Cisco wireless LAN financing package to their Cisco Systems Capital? Corporation lease to make deploying Cisco WLAN solutions easier. A Cisco Systems Capital Corporation lease allows companies to minimize their initial investments, control their budgets, and avoid technology obsolescence while increasing employee productivity, improving employee responsiveness to customers, and enhancing employee, partner, and customer collaboration. Read more at the Cisco Wireless LAN Financing Program.

SUMMARY

The dramatic increase in the number of Wi-Fi enabled notebook computers and Cisco Compatible client devices available worldwide is leading to the rapid deployment of WLANs across enterprise campuses, branch offices, and remote locations. Organizations deploying WLANs are experiencing an increase in employee productivity and efficiency, gaining a competitive advantage, and providing network users with a new

level of freedom and flexibility. These WLANs are improving business operations and enabling real-time access to business-critical applications and network resources.

The Cisco Unified Wireless Network unifies wireless and wired LANs. It identifies, prevents, and adapts to both known and unknown security threats. It supports innovative

RF technology solutions and delivers the same level of security, scalability, and manageability for wireless LANs that organizations expect in their wired LANs.

Cisco has the flexibility and scalability to meet the requirements of networks of all sizes, from small businesses to large-scale enterprise multinational companies; within WLAN campus deployments or branch offices; at universities; in the retail, finance, manufacturing, and healthcare industries; or in hotspot locations.

The Cisco Unified Wireless Network allows companies to put the RF environment to work to improve the way they do business. This solution addresses the deployment, management, and RF challenges associated with building business-critical WLANs. It reduces overall operational expenses and simplifies network deployment, operations, and management. This solution helps IT managers take full advantage of their existing tools, knowledge, and network resources to cost-effectively address critical WLAN security, implementation, and control issues.

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