19/05/06 Nhu cầu chia sẻ tài nguyên thông tin, dịch vụ Hanoi University of Technology 19/05/06 Faculty of Electronics and Telecommunications Mạng liệu • Nhược điểm phương thức trao đổi thông tin cũ – Dư thừa tài nguyên thiết bị – Hiệu suất trao đổi thông tin thấp – Khó quản lý mạng • Mạng LAN đời cung cấp chuẩn mở cho phần cứng, phần mềm thiết bị mạng Hanoi University of Technology Faculty of Electronics and Telecommunications SinhVienZone.com https://fb.com/sinhvienzonevn 19/05/06 Hanoi University of Technology 19/05/06 Faculty of Electronics and Telecommunications Lịch sử phát triển mạng • • • • • • 1970’s: Small computer came into existence 1983: TCP/IP become the universal language 1984: up to 1000 Internet host 1996: Number of Internet host exceeds 10 mill 1999: Video, Voice and Data convergence 2001: Number of Internet host exceeds 110 mill Hanoi University of Technology Faculty of Electronics and Telecommunications SinhVienZone.com https://fb.com/sinhvienzonevn 19/05/06 Thiết bị mạng Hanoi University of Technology Faculty of Electronics and Telecommunications 19/05/06 Hanoi University of Technology Faculty of Electronics and Telecommunications SinhVienZone.com https://fb.com/sinhvienzonevn 19/05/06 • • • • • Topology mạng Topology mạng định nghĩa cấu trúc mạng Topology vật lý (physical), xem kết nối thực dây dẫn hay phương tiện truyền dẫn Topology logic (logical) , xem cách thức truy nhập môi trường truyền dẫn máy tính truyền liệu Logical topology thể cách thức máy tính trao đổi thơng tin qua môi trường truyền dẫn Hai loại logical topologies broadcast token passing Hanoi University of Technology 19/05/06 Faculty of Electronics and Telecommunications Bus Topology “A bus topology uses a single backbone segment (length of cable) that all the hosts connect to directly.” Hanoi University of Technology Faculty of Electronics and Telecommunications SinhVienZone.com https://fb.com/sinhvienzonevn 19/05/06 Ring Topology “A ring topology connects one host to the next and the last host to the first This creates a physical ring of cable.” Hanoi University of Technology 19/05/06 Faculty of Electronics and Telecommunications Token Ring • Token Ring NIC MAU Hanoi University of Technology 10 Faculty of Electronics and Telecommunications SinhVienZone.com https://fb.com/sinhvienzonevn 19/05/06 Topology hình (Star) “A star topology connects all cables to a central point of concentration This point is usually a hub or switch, which will be described later in the chapter.” Hanoi University of Technology 19/05/06 11 Faculty of Electronics and Telecommunications Extended Star Topology “An extended star topology uses the star topology to be created It links individual stars together by linking the hubs/switches This, as you will learn later in the chapter, will extend the length and size of the network.” Hanoi University of Technology 12 Faculty of Electronics and Telecommunications SinhVienZone.com https://fb.com/sinhvienzonevn 19/05/06 Mesh Topology “A mesh topology is used when there can be absolutely no break in communications, for example the control systems of a nuclear power plant So as you can see in the graphic, each host has its own connections to all other hosts This also reflects the design of the Internet, which has multiple paths to any one location.” Hanoi University of Technology 19/05/06 13 Faculty of Electronics and Telecommunications Local-area networks (LANs) Một số cơng nghệ mạng LAN: • Ethernet • Token Ring • FDDI Hanoi University of Technology 14 Faculty of Electronics and Telecommunications SinhVienZone.com https://fb.com/sinhvienzonevn 19/05/06 Phân loại mạng • Theo khả cung cấp tài nguyên – Client/Server – Peer-to-peer • Theo Mơ hình mạng – Mạng LAN – Mạng WAN – Mạng MAN • Theo kỹ thuật chuyển mạch • Theo phương thức kết nối (khơng kết nối hướng kết nối) • Theo dạng kết nối (đơn công, song công, bán song công) Hanoi University of Technology 19/05/06 15 Faculty of Electronics and Telecommunications Wide-area networks (WANs) Một số cơng nghệ mạng WAN: • Modems • Integrated Services Digital Network (ISDN) • Digital Subscriber Line (DSL) • Frame Relay • US (T) and Europe (E) Carrier Series – T1, E1, T3, E3 • Synchronous Optical Network (SONET) Hanoi University of Technology 16 Faculty of Electronics and Telecommunications SinhVienZone.com https://fb.com/sinhvienzonevn 19/05/06 Metropolitan-area networks (MANs) • MAN thường mở rộng phạm vi thành phố chứa nhiều mạng LAN Hanoi University of Technology 17 Faculty of Electronics and Telecommunications SinhVienZone.com https://fb.com/sinhvienzonevn ... Telecommunications 19/05/06 Hanoi University of Technology Faculty of Electronics and Telecommunications SinhVienZone. com https://fb .com/ sinhvienzonevn 19/05/06 • • • • • Topology mạng Topology mạng. .. Synchronous Optical Network (SONET) Hanoi University of Technology 16 Faculty of Electronics and Telecommunications SinhVienZone. com https://fb .com/ sinhvienzonevn 19/05/06 Metropolitan-area networks (MANs)... LAN: • Ethernet • Token Ring • FDDI Hanoi University of Technology 14 Faculty of Electronics and Telecommunications SinhVienZone. com https://fb .com/ sinhvienzonevn 19/05/06 Phân loại mạng • Theo