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Chapter 5 Data Link Layer

Chapter 5 Data Link Layer

CMPT 371 Data Communications and Networking. Chapter 5 Data Link Layer. Our goals: understand principles behind data link layer services: error detection, correction sharing a broadcast channel: multiple access link layer addressing reliable data transfer, flow control: done!

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1.41k views • 118 slides
Physical Media

Physical Media

physical link: transmitted data bit propagates across link guided media: signals propagate in solid media: copper, fiber unguided media: signals propagate freely, e.g., radio. Twisted Pair (TP) two insulated copper wires Category 3: traditional phone wires, 10 Mbps ethernet

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1.05k views • 70 slides
Chapter 5: The Data Link Layer

Chapter 5: The Data Link Layer

Our goals: understand principles behind data link layer services: error detection, correction sharing a broadcast channel: multiple access link layer addressing reliable data transfer, flow control: done! instantiation and implementation of various link layer technologies. Overview:

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428 views • 32 slides
Chapter 5: The Data Link Layer

Chapter 5: The Data Link Layer

Our goals: understand principles behind data link layer services: error detection, correction sharing a broadcast channel: multiple access link layer addressing reliable data transfer, flow control: done! instantiation and implementation of various link layer technologies. Overview:

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425 views • 32 slides
Chapter 6: Basic Wireless (last updated 02/05/05)

Chapter 6: Basic Wireless (last updated 02/05/05)

A quick intro to CDMA Basic 802.11. Chapter 6: Basic Wireless (last updated 02/05/05). Channel Partitioning (CDMA). We previously saw two different ways to partition channels, TDMA and FDMA . They, respectively, partition the channels up into time slots and frequency bands.

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204 views • 14 slides
Error Detection

Error Detection

Error Detection. EDC= Error Detection and Correction bits (redundancy) D = Data protected by error checking, may include header fields Error detection not 100% reliable! protocol may miss some errors, but rarely larger EDC field yields better detection and correction. Parity Checking.

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613 views • 8 slides

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