Performance of LANs and Routers

5/1/97


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Table of Contents

Performance of LANs and Routers

Outline

Analytical Approach

CSMA/CD

Statistical Arrivals

Properties of Poisson

“Aloha” Analysis

Throughput of Aloha

Increasing the Frame Size

Analysis

Solution

Effect of Frame Length

Effect of Longer Frames

Including Retries

Exponential Backoff

Example

Ethernet (IEEE 802.3)

Positives and Negatives of Ethernet

Analysis of Backoffs

Performance of Backoffs

Avoiding Decline in Throughput

Things to Think About

Switches and Routers

Simple FIFO Queue

M/M/1

Analysis

Solution

Bounded Queues

Solution

Things to Think About

Author: Richard Ladner -- CSE 588

Email: cse588@cs.washington.edu

Home Page: http://www.cs.washington.edu/education/courses/cse588/97sp/

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