tailieunhanh - 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. | Chapter 01: Overview MẠNG MÁY TÍNH NÂNG CAO 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 Data networks Network topology Logical Topologies Broadcast Token Passing Local-area networks (LANs) Local-area networks (LANs) LANs consist of the following components: Computers Network interface cards Peripheral devices Networking media Network devices Some common LAN technologies are: Ethernet Token Ring FDDI Wide-area networks (WANs) Wide-area networks (WANs) WANs interconnect LANs, which then provide access to computers or file servers in other locations. Some common WAN technologies are: Modems Integrated Services Digital Network (ISDN) Digital Subscriber Line (DSL) Frame Relay US (T) and Europe . | Chapter 01: Overview MẠNG MÁY TÍNH NÂNG CAO 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 Data networks Network topology Logical Topologies Broadcast Token Passing Local-area networks (LANs) Local-area networks (LANs) LANs consist of the following components: Computers Network interface cards Peripheral devices Networking media Network devices Some common LAN technologies are: Ethernet Token Ring FDDI Wide-area networks (WANs) Wide-area networks (WANs) WANs interconnect LANs, which then provide access to computers or file servers in other locations. 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 Synchronous Optical Network (SONET) OSI layers Dividing the network into seven layers provides the following advantages: It breaks network communication into smaller, 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. It divides network communication into smaller parts to make learning it easier to understand. TCP/IP model TCP/IP model Ethernet and the OSI model Ethernet and the OSI model Ethernet Naming – MAC address Ethernet frame fields Start Frame Delimiter : 10101011 Encapsulating Data De - encapsulating Data Switches and Bridges Data Link OR 1 2 3 1 2 4 Each segment has its own collision domain All segments are in the same broadcast domain Broadcasts are forwarded to all segments Ethernet .

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