ECEN4533 Data Communications
Lecture #32 6 April 2009
Dr. George Scheets

ECEN4533 Data Communications
Lecture #33 8 April 2009
Dr. George Scheets

ECEN4533 Data Communications
Lecture #34 10 April 2009
Dr. George Scheets

TCP Retran Timers

RTT depends on network conditions:
EX) Packet #2 lost.  RTO2 times out.

RTT depends on network conditions:
EX) Queuing Delays

TCP Window Management

TCP Flow Chart (simplified)

TCP Congestion Avoidance

TCP Congestion Avoidance

TCP Window Management

TCP Congestion Avoidance

Failure Analysis/Survivability

Anaheim - Dallas Fails

Reconfigure Time

UDP Header

Sources of POTS delay

Sources of VoIP delay

Voice Quality vs. Bit Rate

Slide 20