Lecture #14: Local Area Networks ALOHA Ethernet Token Ring ...

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Cabling and speed �� Shielded Twisted Pair with unique hermaphroditic connectors (IBM “Type 1”) or �� Symmetric pair. pair �� Speed: – 4 Mbps (1985) – 16 Mpbs (1989, IBM) 38
Token Ring frame formats Data or command frame SD 8 bits AC 8 bits FC 8 bits SD 8 bits DA 48 bits SD: Starting delimiter AC: Access control FC: Frame control AC 8 bits DA: Destination address SA: Source address SA 48 bits ED 8 bits PDU from LLC (IEEE 802.2) up to 18200x8 18200x8 bits Token Abort frame SD 8 bits ED 8 bits CRC 32 bits PDU: data CRC: check sum ED: End delimiter FS: Frame status ED 8 bits FS 8 bits 39
Page 1 and 2: Lecture #14: Local Area Networks AL
Page 3 and 4: The Channel Allocation Problem �
Page 5 and 6: Dynamic Channel Allocation in LANs
Page 7 and 8: �� ALOHA ALOHA ALOHA - a ground
Page 9 and 10: Pure ALOHA (2) Frames are transmitt
Page 11 and 12: Slotted ALOHA �� The method: Di
Page 13 and 14: Carrier Sense Multiple Access Proto
Page 15 and 16: CSMA types: persistent and nonpersi
Page 17 and 18: CSMA types: persistent and nonpersi
Page 19 and 20: CSMA with Collision Detection (CSMA
Page 21 and 22: CSMA / CD details �� After a st
Page 23 and 24: Collision-Free Collision Free Proto
Page 25 and 26: The basic bit-map bit map protocol
Page 27 and 28: Ethernet �� IEEE has standardiz
Page 29 and 30: Three kinds of Ethernet cabling 10B
Page 31 and 32: Manchester encoding 31
Page 33 and 34: Ethernet frame format ��Preambl
Page 35 and 36: Ethernet Performance at 10 Mbps wit
Page 37: Token Ring - IEEE 802.5 �� A ri
Page 41 and 42: Active and Standby monitors ��

Lecture #14: Local Area Networks ALOHA Ethernet Token Ring ...

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