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| الجهاز الثاني: ![]() Cisco Aironet 1240AG Series IEEE 802.11a/b/g access points deliver the versatility, high capacity, security, and enterprise-class features demanded by WLAN customers. Designed specifically for challenging RF environments like factories, warehouses, and large retail establishments it has the versatility associated with connected antennas, a rugged metal enclosure, and a broad operating temperature range. The Aironet 1240AG Series is available in: A lightweight version An autonomous version that can be field-upgraded to lightweight operation A single-band 802.11g version for use in regulatory domains that do not allow 802.11a/5 GHz operation The product comes complete with all the mounting hardware necessary for a secure, rugged installation. The mounting bracket locks the access point as well as the Ethernet and console cables in place to prevent theft and tampering. وللموضوع بقية |
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| الجهاز الثالث: ![]() Cisco Aironet Wireless Access Points -------------------------------------------------------------------------------- As WLAN deployments expand, security, scalability, reliability, ease of deployment, and management become increasingly important. Cisco provides a comprehensive line of access points that deliver enterprise-class features for business-ready wireless LANs. Deployment Environments Wireless LANs are becoming commonplace in numerous environments, including offices, schools, factories, warehouses, and even the outdoors. At the same time, the wireless industry is evolving from lower-capacity, single-band devices to high-capacity, dual-band solutions. The Cisco Aironet Family of access points meets these various application requirements by providing: • Single- and dual-band access points • Devices designed for indoor and outdoor deployments • A consistent hardware feature set and predictable RF performance for deployment across the enterprise As WLAN deployment expands into more applications and installation scenarios, a diverse line of access points is required to meet the associated capacity, coverage, and environmental requirements. The Cisco product line includes access points designed for offices and similar facilities, such as hospitals and retail environments, challenging RF environments like factories and warehouses, and the outdoors. These devices can be installed on desktops, on walls, on ceilings, above ceilings, and on top of poles. While application requirements may vary, Cisco understands that all enterprise customers require uncompromised network security, scalable manageability, and an evolving set of network services. That's why all Cisco Aironet access points support the Cisco Unified Wireless Network, a framework for wired and wireless integration that delivers the security, manageability, and services that enterprises have come to expect from Cisco on both wired and wireless networks. Solution Addressing Feature Requirements As wireless LAN usage has evolved from basic transport for largely transactional applications, so have the feature expectations of wireless LAN users and administrators. This change has come about on a segment-by-segment, customer-by-customer basis. It is critical for Cisco to provide differing feature sets to best fit differing customer requirements. Given that customer requirements can evolve during the lifetime of a wireless LAN deployment, it is also necessary to provide a means of smoothly upgrading this feature set for the installed base of products, with minimal disruption to network operations. Cisco's unified wireless LAN feature set offers the features required for most enterprise deployments. Some deployments may not yet require these advanced capabilities. To address these evolving requirements, customers can select lightweight access points, or they can upgrade autonomous access points in the field to lightweight operation. With Cisco, customers can choose the feature set that is right for them, at the time that it is right for them. Table 1 provides a summary of the operational capabilities of various Cisco Aironet access points Addressing Capacity Requirements In just a few years, WLANs have evolved from proprietary systems with sub-Mbps capabilities to standardized offerings operating at data rates as high as 600 Mbps for dual-band 802.11n access points. These high data rates are available by taking advantage of the emerging 802.11n draft 2.0 standard with radios operating in both the 2.4 GHz band and the 5 GHz band. 802.11n draft 2.0 offers backward compatibility with 802.11a/b/g devices. Both 802.11b/g and 802.11n draft 2.0 are limited to three nonoverlapping channels when deployed in the 2.4 GHz band. 802.11a and 802.11n draft 2.0 support as many as 23 channels in the 5 GHz band (depending upon local regulations). To provide both backward compatibility and high capacity, WLAN client vendors are migrating to 802.11n-capable client devices, although many devices will continue to support the 802.11a/b/g standards and the 802.11n support complete backwards compatibility to ensure investment protection. Deploying an infrastructure that takes full advantage of next generation wireless with 802.11n makes sense if capacity or reliability is currently an issue or is expected to become an issue during the useful life of the infrastructure devices. Given the rapid expansion of wireless-enabled devices, increasing capacity requirements are likely to apply to most WLAN installations. For this majority of applications, access points that support the emerging 802.11n draft 2.0 standard represents a better long-term value, particularly given the low price premium relative to performance. For the few applications that are not expected to present capacity issues in the near term, customers can choose existing 802.11a/g dual-radio access points. Table 2 summarizes which Cisco access points support 802.11a, 802.11b, 802.11g, and the new 802.11n draft 2.0 standard. Figure 1. Cisco Unified IDS/IPS Detects Malicious Attacks Allowing the WLAN Controller to Disassociate the Offending Client Device |
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| شكرا على هذا الايضاح ولدي تساؤل بالنسبة للجهاز Cisco Aironet 1240AG Series هل يدعم الآتي جميعاً.. IEEE 802.11a/b/g 802.11a 802.11b 802.11g ومن المعلوم أن لكل ستنادرد من هذه باند ودث معين فمثلاً a على 5G و b على 2.4G وكذلك g مع اختلاف في كمية البيانات المرسلة من كل منهم.. فكيف يتم التوفيق بين كل هذه المعايير في جهاز واحد.. وهل قمت بتجربة هذا الجهاز من قبل..؟؟ وهل هو للاستخدام المنزلي..؟؟ وهل سعره معقول في حالة الشراء..؟؟ وهل له عيوب واضحة بالنسبة للمدى الاقصى المسموح به..؟؟ يا ليت إجابات نستفيد منها.. شكرا مقدماً... |
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