'Frame seqnum' presentation slideshows

CS2302- COMPUTER NETWORKS

CS2302- COMPUTER NETWORKS. RAJALAKSHMI ENGINEERING COLLEGE DEPARTMENT OF INFORMATION TECHNOLOGY. UNIT I. INTRODUCTION: A computer network is a group of interconnected computers A collection of computers and devices connected to each other.

1.64k views • 149 slides

Link Layer

Link Layer. Dr. Mozafar Bag-Mohammadi University of Ilam. Contents. Overview Error detection Encoding Framing Acknowledgements & Timeouts. 1. Overview: Link Layer. Communication service between two physically connected devices: host-router, router-router, host-host

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Outline Encoding Framing Error Detection Sliding Window Algorithm

Point-to-Point Links. Outline Encoding Framing Error Detection Sliding Window Algorithm. Bits. 0. 0. 1. 0. 1. 1. 1. 1. 0. 1. 0. 0. 0. 0. 1. 0. NRZ. Encoding. Signals propagate over a physical medium modulate electromagnetic waves e.g., vary voltage

323 views • 21 slides

Outline Encoding Framing Error Detection Sliding Window Algorithm

Point-to-Point Links. Outline Encoding Framing Error Detection Sliding Window Algorithm. Encoding. Signals propagate over a physical medium modulate electromagnetic waves e.g., vary voltage Encode binary data onto signals e.g., 0 as low signal and 1 as high signal

339 views • 21 slides

Outline Encoding Framing Error Detection Sliding Window Algorithm

Point-to-Point Links. Outline Encoding Framing Error Detection Sliding Window Algorithm. Encoding. Signals propagate over a physical medium modulate electromagnetic waves e.g., vary voltage Encode binary data onto signals e.g., 0 as low signal and 1 as high signal

380 views • 21 slides

Outline Encoding Framing Error Detection Sliding Window Algorithm

Point-to-Point Links. Outline Encoding Framing Error Detection Sliding Window Algorithm. Bits. 0. 0. 1. 0. 1. 1. 1. 1. 0. 1. 0. 0. 0. 0. 1. 0. NRZ. Encoding. Signals propagate over a physical medium modulate electromagnetic waves e.g., vary voltage

324 views • 21 slides

Reliable Transmission

Reliable Transmission. Overview. Recover from Corrupt Frames Error Correction Codes (ECC); also called Forward Error Correction (FEC) Acknowledgements and Timeouts; also called Automatic Repeat reQuest (ARQ). ARQ. Send the data When acknowledged (ACK), send the next piece of data

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Overview

Overview. Direct link networks Error detection - Section 2.4 Reliable transmission - Section 2.5. Error Detection. Problem of detecting errors introduced into frames Specific mechanism that introduces errors depends on the network technology - thermal, radio interference etc.

292 views • 17 slides