Overlay networks

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  • In recent years, Internet has known an unprecedented growth, which, in turn, has lead to an increased demand for real-time and multimedia applications that have high Quality-of-Service (QoS) demands. This evolution lead to di±cult challenges for the Internet Service Providers (ISPs) to provide good QoS for their clients as well as for the ability to provide di®erentiated service subscriptions for those clients who are willing to pay more for value added services.

    pdf78p monkey68 13-03-2009 97 19   Download

  • Unix was developed by AT&T in the late 1960s and early 1970s, and was freely distributed among a number of major universities during this time. Concurrently, these universities were developing the network that evolved into the Internet.

    pdf96p mylinh 17-08-2009 142 17   Download

  • As innovative ways are being developed to harvest the enormous potential of the Internet infrastructure, a new class of large-scale globally-distributed network services and applications such as distributed content hosting services, overlay network multicast [1][2], content addressable overlay networks [3][4], and peer-to-peer file sharing such as Napster and Gnutella have emerged. Because these systems have a lot of flexibility in choosing their communication paths, they can greatly benefit from intelligent path selection based on network performance.

    pdf10p doiroimavanchuadc 06-02-2013 13 2   Download

  • In contrast with other VPN technologies, MPLS VPN supports optimum any-toany connectivity between customer sites (equivalent to the full mesh of overlay VPN networks) without the end customer having to manually configure anything. The provider only needs to configure the VPN in the Provider Edge (PE) routers. The so-called “hub-and-spoke” topology, which was primarily used to reduce the cost of the network, is no longer needed. The interconnection of CE sites is done automatically by using BGP and an IGP to find the shortest path....

    pdf1p trungha 28-08-2009 203 69   Download

  • A network designer that wants to design a scalable MPLS VPN solution is always faced with a number of scalability issues, several of them being related to the MPLS VPN architecture: n MPLS VPN uses internal BGP (IBGP) to propagate VPNv4 routes between PE routers. Default IBGP implementation requires a full-mesh of BGP sessions between PE routers—a design that is only appropriate for very small networks.

    pdf1p trungha 28-08-2009 90 25   Download

  • The Soneplex® management access point (MAP) chassis dapts and concentrates telemetry byte oriented serial TBOS) alarm and control signals into simplified network management protocol (SNMP) messages. Equipment ormerly monitored by TBOS can now be added to SNMP management systems used by other data or transmission products, eliminating the TBOS overlay network. The MAP nables centralized end-to-end circuit visibility, reduces overall costs of the management network and provides a unified SNMP presentation to the operations personnel....

    pdf4p batoan 10-08-2009 120 22   Download

  • PhotoShop - Tạo tiêu đề cho menu Trong bài hướng dẫn này, chúng tôi sẽ hướng dẫn bạn cách tạo một tiêu đề menu ấn tượng. Bạn sẽ học cách sử dụng công cụ Rectangle marquee tool, Drop shadow, Gradient overlay và Outer glow trên menu và rất nhiều thao tác khác.

    pdf9p alone 23-07-2010 90 21   Download

  • Hiệu ứng ánh sáng cho ảnh Mở tấm ảnh cần mần: Ctrl+j để copy nó ra như hình dưới nè Vào Filters - Others - Maximum Radius khoảng 3-4 pixels. OK. như hình dưới: Vào Filters = Blur = Gaussian Blur điều chỉnh Radius khoảng 4-5 pixels. OK.

    pdf6p maicon24 27-07-2010 72 13   Download

  • Review of ONT2 - From Executive Summary – The Vision Layer 1/ Layer 2 networking is going to create entirely new kind of network for real applications. Underlay and overlay taken together can provide new layered services Immediate Need to Buy Dark Fiber Changes Needed at Campus Level GLIF GENI 3 Generation and Paradigm Generation ・Fundamental concept and structure of the systems, are maintained, and functions and performances are improved.

    pdf46p khinhkha 20-07-2010 51 5   Download

  • Syndication of micronews, frequently-updated content on the Web, is currently accomplished with RSS feeds and client applications that poll those feeds. However, providers of RSS content have recently become concerned about the escalating bandwidth demand of RSS readers. Current efforts to address this problem by optimizing the polling behavior of clients sacrifice timeliness without fun- damentally improving the scalability of the system.

    pdf26p giamdocamnhac 06-04-2013 23 3   Download

  • The obvious alternative to polling for data is to dis- tribute that data, as it becomes available, to lists of subscribers. This approach may be adequate for small subscription lists (for example, e-mail lists), but it will not scale to accommodate the growing subscription de- mands of Web site syndication. Furthermore, while such an approach may reduce the overall bandwidth usage of RSS (by reducing unnecessary fetches), it does nothing to alleviate the per-update stress on network links close to the source.

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  • SunCom, an award winning wireless carrier in the Southeast, has added a GSM overlay to its network, transitioning from pure TDMA service to accommodate customers using both types of services. As part of this effort, the carrier built a new macro site to deliver both TDMA and GSM service to The Homestead resort and conference center.

    pdf2p mylinh 14-08-2009 56 9   Download

  • Handoff in mobile and wireless networks Wireless data services use small-coverage high-bandwidth data networks such as IEEE 802.11 whenever they are available and switch to an overlay service such as the General Packet Radio Service (GPRS) network with low bandwidth when the coverage of a Wireless Local Area Network (WLAN) is not available. From the service point of view, Asynchronous Transfer Mode (ATM) combines both the data and multimedia information into the wired networks while scaling well from backbones to the customer premises networks....

    pdf16p doroxon 16-08-2010 46 3   Download

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