IEEE 802 standards

IEEE 802 standards

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   Explain theIEEE 802 networking model and related standards Guide to Networking Essentials, Fifth Edition 2
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   Institute ofElectrical and Electronics Engineers  Leading developer of industry and standards in a broad range of technologies  Mission: foster technological innovation and excellence for the benefit of humanity. Guide to Networking Essentials, Fifth Edition 3
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   provides detailedimplementation specifications for a number of networking technologies  Influential set of networking standards Guide to Networking Essentials, Fifth Edition 4
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   The IEEEdefined a set of LAN standards to ensure network interface and cabling compatibility  Project 802 (inception on February (2) of 1980) ▪ Concentrates on standards that describe a network’s physical elements ▪ NICs, cables, connectors, signaling technologies, media access control, and the like  OSI model was not standardized until 1983–1984  IEEE 802 standards predate the model  Both were developed in collaboration and are compatible with one another Guide to Networking Essentials, Fifth Edition 5
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  Guide to NetworkingEssentials, Fifth Edition 6
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  Guide to NetworkingEssentials, Fifth Edition 7 IEEE 802 Specifications (continued)
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   MediumAccess Control collisions  Data Communications Protocol  A protocol must also exist for transmitting data once the node has gained control of the medium and is able to transmit. Guide to Networking Essentials, Fifth Edition 8
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  Guide to NetworkingEssentials, Fifth Edition 9
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  Guide to NetworkingEssentials, Fifth Edition 10
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  Guide to NetworkingEssentials, Fifth Edition 11
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   Ethernet  CSMA/CD– Carrier Sense MultipleAccess with Collision Detection  Terminates transmission when it detects collision Guide to Networking Essentials, Fifth Edition 12
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   Token Bus Implementing a token ring protocol on a coaxial cable  Used for industrial applications  Used by General Motors in their MAP (ManufacturingAutomation Protocol)  Not reliable Guide to Networking Essentials, Fifth Edition 13
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  Guide to NetworkingEssentials, Fifth Edition 14
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   Demand Priorityor High Speed Networking  100Mbps Ethernet standard over Category 3UTP  Also called 100VG AnyLAN  Carries both Ethernet andToken Ring Guide to Networking Essentials, Fifth Edition 15
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   The OSIreference model and IEEE Project 802 define a frame of reference for networking and specify the lower-layer behaviors for most networks  Together, these models describe the complex processes and operations involved in sending and receiving information across a network  The OSI reference model separates networking into seven layers, each with its own purposes/activities  From the bottom up: Physical, Data Link, Network, Transport, Session, Presentation, and Application Guide to Networking Essentials, Fifth Edition 16
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   Data framesconsist of three parts: frame header, data section, and frame trailer  Classified as unicast, multicast, or broadcast frames  The IEEE 802 project elaborates on the functions of a network’s Physical and Data Link layers by dividing the Data Link layer into two sublayers: Logical Link Control (LLC) and Media Access Control (MAC)  Together, these sublayers handle media access, addressing, and control and provide reliable, error-free delivery of data frames from one computer to another Guide to Networking Essentials, Fifth Edition 17