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Ethernet

Ethernet. Elements of the Ethernet System. physical medium used to carry Ethernet signals between computers set of medium access control rules embedded in each Ethernet interface Ethernet frame that consists of a set of bits used to carry data over the system. Operation of Ethernet.

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Ethernet

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  1. Ethernet

  2. Elements of the Ethernet System • physical medium used to carry Ethernet signals between computers • set of medium access control rules embedded in each Ethernet interface • Ethernet frame that consists of a set of bits used to carry data over the system.

  3. Operation of Ethernet • CSMA/CD Protocol • Collisions • Best Effort Data Delivery • High-level network protocols do this by establishing a reliable data transport service

  4. Ethernet Frame and Ethernet Addresses

  5. Ethernet Frame and Ethernet Addresses • address fields • variable size data field - carries 46-1,500 bytes of data • error checking field - checks integrity of the bits in the frame to make sure that the frame has arrived intact

  6. Address Fields • 48-bit addresses • IEEE controls assignment of these addresses • Organizationally Unique Identifiers (OUIs) • 24-bit identifier assigned to each organization that wishes to build Ethernet interfaces • organization creates 48-bit addresses using assigned OUI as the first 24 bits of the address

  7. High-Level Protocols and Ethernet Addresses • High-level protocol software - e.g. TCP/IP protocol suite • Address Resolution Protocol (ARP)

  8. Address Resolution Protocol (ARP) • Resolve physical address

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