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

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

MẠNG MÁY TÍNH NÂNG CAO 1 Advanced Computer Networks Chapter 01: Overview NLUFIT
Data networks 2  Data networks developed as a result of business applications that were written for microcomputers. Advanced Computer Networks  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 NLUFIT
NLUFIT Advanced Computer Networks 3 Network topology
Logical Topologies 4 Broadcast Advanced Computer Networks Token Passing NLUFIT
NLUFIT Advanced Computer Networks 5 Local-area networks (LANs)
Local-area networks (LANs)  LANs consist of the following components: 6 • Computers • Network interface cards Advanced Computer Networks • Peripheral devices • Networking media • Network devices  Some common LAN technologies are: • Ethernet • Token Ring • FDDI NLUFIT
NLUFIT Advanced Computer Networks 7 Wide-area networks (WANs)
Wide-area networks (WANs)  WANs interconnect LANs, which then 8 provide access to computers or file servers in other locations. Advanced Computer Networks  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 layers 9 provides the following advantages: • It breaks network communication into smaller, Advanced Computer Networks 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 Advanced Computer Networks 10 TCP/IP model
NLUFIT Advanced Computer Networks 11 TCP/IP model
NLUFIT Advanced Computer Networks 12 Ethernet and the OSI model
NLUFIT Advanced Computer Networks 13 Ethernet and the OSI model
NLUFIT Advanced Computer Networks 14 Ethernet Naming – MAC address
Ethernet frame fields 15 Advanced Computer Networks NLUFIT Start Frame Delimiter : 10101011
Encapsulating Data 16 Application Presentation Advanced Computer Networks Upper Layer Data Session Segment Transport TCP Header Upper Layer Data Network Packet IP Header Data LLC Header Data FCS Data Link Frame MAC Header Data FCS Physical Bits NLUFIT 0101110101001000010
De - encapsulating Data 17 Application Presentation Advanced Computer Networks Session Upper Layer Data Transport Upper Layer Data Network TCP+ Upper Layer Data IP + TCP + Upper Layer Data Data Link LLC Hdr + IP + TCP + Upper Layer Data Physical NLUFIT 0101110101001000010
Switches and Bridges 18 Data Link Advanced Computer Networks 1 2 3 4 OR 1 2 • Each segment has its own collision domain • All segments are in the same broadcast domain NLUFIT • Broadcasts are forwarded to all segments
NLUFIT Advanced Computer Networks 19 Ethernet Switching
Network Device Domains 20 Hub Bridge Switch Router Advanced Computer Networks Collision Domains: 1 4 4 4 Broadcast Domains: 1 1 1 4 NLUFIT