Table of Contents
3.2 Data Link Layer : Error & Flow Control
Line Configurations
Point to Point - example
Multipoint Links - Primary & Secondary Nodes
Flow Control - Stop & Wait
Performance - Link Utilization = U
Definition of Parameter ìaî
Impact of a on Utilization
Flow Control - Sliding Window
Flow Control - Sliding Window (N=4)
Error Control-ARQ (automatic repeat request)
Automatic Repeat Request protocols (ARQ)
Error Control
Sliding Window Based- Go-back-N ARQ
Go-back-N ARQ
Performance of Stop & Wait ARQ
Performance of Sliding Window: no errors
Performance of Sliding Window (Nə+2a)
Performance of Selective Repeat with Errors
Performance of Go-back-N ARQ : with errors
Performance of Go-back-N ARQ
Performance Comparison
Sliding Window with Selective Repeat & NAKs
HDLC-High Level Data Link Control-ISO 3309
HDLC -synchronous xmission -1 frame format
Control Field Format - three frame types
HDLC Commands & Responses
HDLC example - one way, reject recovery
HDLC example - busy condition
Protocol Analysis - Finite State Machines
Petri Net Models
Tanenbaumís Protocol 3 - Petri Net Model
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