04-LAN+and+Ethernet

04-LAN+and+Ethernet - Local Area Network(LAN) Protocols,...

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1 Local Area Network(LAN) Protocols, Ethernet, and the IEEE802.3 standard Leon-Garcia 6.6, 6.7 Background Leon-Garcia 5.4, 3.8, 3.6, 5.6 Outline • Ethernet overview Background • Background – Layer 2 operations – Local Area Networks and LAN topologies • Ethernet Frame • Ethernet Physical Laye Ethernet Physical Layer • Ethernet MAC Layer • Ethernet LLC Layer McNair F'11 EEL5718: Computer Communications 2
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2 Ethernet Overview • Ethernet – Mid-1970’s developed by Xerox Corporation – 1979 - standardized by Xerox, DEC and Intel – 1983 - IEEE released official Ethernet standard IEEE 802.3 • Fast Ethernet – 1995 – standard adopted – Ten times the speed of regular Ethernet – Same frame standard, MAC protocol (MAC) and cabling • Gigabit Ethernet – 1999 - standard ratified – Similar frame standard, MAC protocol, fiber optic cables McNair F'11 EEL5718: Computer Communications 3 Ethernet Advantages • Ease of use • Ubiquity • Low cost hardware to support it • Reduced panel space (twisted pair Ethernet) • Scalability • Legacy support •… Æ Other LAN standards fell behind 4
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3 Outline • Ethernet overview Background • Background – Layer 2 operations – Local Area Networks and LAN topologies • Ethernet Frame • Ethernet Physical Laye Ethernet Physical Layer • Ethernet MAC Layer • Ethernet LLC Layer McNair F'11 EEL5718: Computer Communications 5 Types of Networks Router Router Dest 4 Local Area Network (LAN) ISP Router Router LAN Home PC Wide Area Network (WAN) MAN 6 Local Area Networks (LANs) – IEEE 802, Bluetooth, HIPERLAN Metropolitan Area Networks (MANs) –DQD B , H A LO Wide Area Networks (WANs) – Internet, PSTN, UMTS
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4 Open Systems Interconnection (OSI) Reference Model Application Layer Telnet, FTP, DNS, Email, HTTP Presentation Layer Session Layer Transport Layer Data structures, integer coding Token management, synchronization End-to-end establish/delete connections, regulate flow of information Subnet operation packet routing Subnet operation, packet routing, congestion control, billing Error handling, framing, medium access Bit transmission Physical Layer Data Link Layer Network Layer McNair F'11 EEL5718: Computer Communications 7 Open Systems Interconnection (OSI) Reference Model Application Layer Presentation Layer Session Layer Transport Layer Network Layer In LANs, the “link” is broadcast, and a medium access control (MAC) procedure is Bit transmission Physical Layer Logical Link Control SubLayer --------------------------------- Medium Access Control Sublayer 8 medium access control (MAC) procedure is needed to coordinate machine transmissions. The logical link layer provides addressing and quality control services and hides the details of the MAC layer from the network.
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5 Outline • Ethernet overview Background • Background – Layer 2 operations – Local Area Networks and LAN topologies • Ethernet Frame • Ethernet Physical Laye Ethernet Physical Layer • Ethernet MAC Layer • Ethernet LLC Layer McNair F'11 EEL5718: Computer Communications 9 Background Local Area Networks (LANs) Scope: Small scope
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This note was uploaded on 09/18/2011 for the course EEL 5718 taught by Professor Janisemcnair during the Fall '11 term at University of Florida.

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04-LAN+and+Ethernet - Local Area Network(LAN) Protocols,...

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