“Big Deal! Bandwidth is Getting Cheap. We’ll Just Add More Capacity. Problem Solved!”

Definitions

• RTT = Round Trip Time: Time to send packet and receive reply

• Loss: Percent of packets that are sent but don’t get to destination

As RTT and/or

loss increase…

TCP maximum

performance

goes down

RTT

(Distance between

sender & receiver)

Loss

Not widely known fact:

Maximum Achievable TCP Performance Is Not a Function of Bandwidth

TCP

Performance

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