Xem 1-20 trên 21 kết quả Atm wan
  • ATM is a packet-switched technology based on a 53-byte packet called a cell. Each cell is divided into a 5-byte header and a 48-byte payload. The short, fixed length cell reduces delay and jitter, allowing time sensitive information such as voice and video to be transported along with data. There are various transmission media and rates available with bandwidth measured in megabits to gigabits.

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  • Modern WAN architectures require additional network capabilities to support current higher bandwidth and mission-critical applications. Requirements for deploying voice over IP (VoIP) and video conferencing include high availability, IP multicast, and quality of service (QoS). Today, most enterprises rely on private WAN connections such as Frame Relay, ATM, or leased-line services to connect their businesses.

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  • Frame Relay is a virtual-circuit wide-area network that was designed in response to demands for a new type of WAN in the late 1980s and early 1990s.

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  • Upon completion you will be able to: Review the features of an ATM WAN, understand how an a datagram can pass through an ATM WAN, understand how an IP packet is encapsulated in cells, understand how cells are routed in an ATM network, understand the function of ATMARP.

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  • Chapter 11 - Wide area networks. In this chapter, we first discuss point-to-point WANs, WANs that do not use switches. Then we discuss switched WANs. We focus especially on ATM, the dominant WAN technology. Finally, we discuss ATM LANs, LANs that use ATM WAN technology.

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  • Chapter 23 - IP over ATM. Upon completion you will be able to: Review the features of an ATM WAN, understand how an a datagram can pass through an ATM WAN, understand how an IP packet is encapsulated in cells, understand how cells are routed in an ATM network, understand the function of ATMARP.

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  • 546 Mạng ATM, Frame Relay và X.25 truyền lưu lượng của nhiều khách hàng khác nhau trong cùng một kết nối. Khách hàng không kiểm soát được số lượng đường kết nối, số lượng trạm trung gian mà dữ liệu phải đi qua trong mạng chia sẻ, cũng như không thể điều khiển được thời gian chờ tại mỗi trạm. Chính vì nhược điểm về thời gian trễ và nghẽn mạch mà các công nghệ này không phù hợp với một số loại lưu lượng mạng.

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  • Enterprise customers have in the past relied heavily upon traditional WAN/MAN services for their connectivity requirements. Layer 2 circuits based on TDM, Frame Relay, ATM, and SONET have formed the mainstay of most low-speed WAN services. More recently, high-speed MAN solutions have been delivered directly over Layer 1 optical circuits, SONET, or through the implementation of point-to-point or point-to-multipoint Ethernet services delivered over one of these two technologies.

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  • This chapter examines the methods used to transport data over wide area networks. We will cover common WAN technologies, such as Frame Relay and ATM, and how they are configured on Cisco routers.

    pdf1p laquang 28-08-2009 72 12   Download

  • Bài giảng môn "Thiết bị mạng - Chương 9: Các công nghệ WAN" giới thiệu tới người đọc tổng quát về công nghệ mạng WAN, các công nghệ mạng WAN phổ biến hiện nay như: Dial-up, ISDN, Leased Line, X.25, Frame Relay, ATM DSL, Cable modem. Đây là một tài liệu hữu ích dành cho các bạn sinh viên Công nghệ thông tin dùng làm tài liệu tham khảo phục vụ học tập và nghiên cứu.

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  • Variante du service DSL, ADSL permet d’utiliser les lignes téléphoniques existantes pour former des chemins d’accès plus rapides destinés au multimédia et aux communications de données à haute vitesse. L’utilisateur doit disposer d’un modem ADSL. Les vitesses supportées sont variables selon la distance ; elles peuvent être supérieures à 6 Mbit/s en réception et atteindre 640 Kbit/s en émission.

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  • Bài giảng Chương 12: Mạng diện rộng và mạng quy mô lớn được biên soạn nhằm trang bị cho các bạn những kiến thức về khái niệm về mạng diện rộng WAN; cách sử dụng, lợi ích, và hạn chế của các công nghệ WAN cao cấp như ATM, FDDI, SONET, và SMDS.

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  • Cisco enterprise customers have in the past relied heavily upon traditional WAN/MAN services for their connectivity requirements. Layer 2 circuits based on TDM, Frame Relay, ATM, and SONET have formed the mainstay of most low-speed WAN services. More recently, high-speed MAN solutions have been delivered directly over Layer 1 optical circuits, SONET, or through the implementation of point-to-point or point-to-multipoint Ethernet services delivered over one of these two technologies.

    pdf218p batoan 11-08-2009 108 48   Download

  • Hình 21 Modems Cổng ra vào (Gateway) Hình 22 Gateway Bộ định tuyến (Router) 19 Hình 23 Router 1.2.3.2 Các chuẩn WAN ISDN (Intergrated Services Digital Network): là một loại mạng viễn thông số tích hợp đa dịch vụ cho phép sử dụng cùng một lúc nhiều dịch vụ trên cùng một đường dây điện thoại thông thường.

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  • KỸ THUẬT MẠNG DIỆN RỘNG WAN Nội dung của chương này sẽ trình bày tổng quát về mạng diện rộng WAN và các loại mạng diện rộng: mạng tích hợp đa dịch vụ số ISDN, B_ISDN, mạng chuyển mạch gói X25, chuyển mạch khung Frame Relay và các ưu nhược điểm của nó và phương thức truyền dẫn không đồng bộ ATM.

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  • In the two decades since their invention, the heterogeneity of networks has expanded further with the deployment of Ethernet, Token Ring, Fiber Distributed Data Interface (FDDI), X.25, Frame Relay, Switched Multimegabit Data Service (SMDS), Integrated Services Digital Network (ISDN), and most recently, Asynchronous Transfer Mode (ATM). The Internet protocols are the best proven approach to internetworking this diverse range of LAN and WAN technologies.

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  • 1. What are the drawbacks of using unnumbered links? Individual WAN interfaces are no longer reachable by ping or telnet if you use unnumbered links. 2. Where should you use unnumbered links in the MPLS backbone? Unnumbered links are recommended in the ATM parts of the MPLS backbone. 3. Where would you use unnumbered links between PE and CE routers? Using unnumbered links between PE and CE routers is highly discouraged. There are, however, applications like dial-up access that benefit from unnumbered links. 4.

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  • Recent measurements of local-area and wide-area traf®c [8, 28, 42] have shown that network traf®c exhibits variability at a wide range of scales. What is striking is the ubiquitousness of the phenomenon, which has been observed in diverse networking contexts, from Ethernet to ATM, LAN and WAN, compressed video, and HTTPbased WWW traf®c [8, 15, 23, 42]. Such scale-invariant variability is in strong contrast to traditional models of network traf®c, which show burstiness at short time scales but are essentially smooth at large time scales; that is, they lack long-range dependence. Since...

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  • In this chapter, we show how the virtual-circuit approach can be used in wide-area networks. Two common WAN technologies use virtual-circuit switching. Frame Relay is a relatively high-speed protocol that can provide some services not available in other WAN technologies such as DSL, cable TV, and T lines. ATM, as a high-speed protocol, can be the superhighway of communication when it deploys physical layer carriers such as SONET.

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  • Upon completion you will be able to: Understand the different versions of wired Ethernet, understand wireless Ethernet, understand the types of point-to-point WANs, understand the types of switched WANs, especially ATM, differentiate between repeaters, bridges, routers, and hubs.

    ppt60p tangtuy09 26-04-2016 1 1   Download

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