Bài giảng Mạng máy tính nâng cao (Advanced computer networks): Chương 1

Data networks developed as a result of business applications that were written for microcomputers. Businesses needed a solution that would successfully address the following three problems: How to avoid duplication of equipment and resources; how to communicate efficiently; how to set up and manage a network.

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Bài giảng Mạng máy tính nâng cao (Advanced computer networks): Chương 1 MẠNGMÁYTÍNHNÂNGCAO1AdvancedComputerNetworks Chapter01:Overview NLUFIT Data networks2  Data networks developed as a result of business applications that were written for microcomputers.AdvancedComputerNetworks  Businesses needed a solution that would successfully address the following three problems: • How to avoid duplication of equipment and resources • How to communicate efficiently • How to set up and manage a network NLUFITNLUFIT AdvancedComputerNetworks 3 Network topology Logical Topologies4 BroadcastAdvancedComputerNetworks TokenPassing NLUFITNLUFIT AdvancedComputerNetworks 5 Local-area networks (LANs) Local-area networks (LANs)  LANs consist of the following components:6 • Computers • Network interface cardsAdvancedComputerNetworks • Peripheral devices • Networking media • Network devices  Some common LAN technologies are: • Ethernet • Token Ring • FDDI NLUFITNLUFIT AdvancedComputerNetworks 7 Wide-area networks (WANs) Wide-area networks (WANs)  WANs interconnect LANs, which then8 provide access to computers or file servers in other locations.AdvancedComputerNetworks  Some common WAN technologies are: • Modems • Integrated Services Digital Network (ISDN) • Digital Subscriber Line (DSL) • Frame Relay • US (T) and Europe (E) Carrier Series – T1, E1, T3, E3 NLUFIT • Synchronous Optical Network (SONET) OSI layers  Dividing the network into seven layers9 provides the following advantages: • It breaks network communication into smaller,AdvancedComputerNetworks more manageable parts. • It standardizes network components to allow multiple vendor development and support. • It allows different types of network hardware and software to communicate with each other. • It prevents changes in one layer from affecting other layers. NLUFIT • It divides network communication into smaller parts to make learning it easier to understand.NLUFIT AdvancedComputerNetworks 10 TCP/IP modelNLUFIT AdvancedComputerNetworks 11 TCP/IP modelNLUFIT AdvancedComputerNetworks 12 Ethernet and the OSI modelNLUFIT AdvancedComputerNetworks 13 Ethernet and the OSI modelNLUFIT AdvancedComputerNetworks 14 Ethernet Naming – MAC address Ethernet frame fields15AdvancedComputerNetworks NLUFIT Start Frame Delimiter : 10101011 Encapsulating Data16 Application PresentationAdvancedComputerNetworks Upper Layer Data Session Segment Transport TCP Header Upper Layer Data ...