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Why are subsequent requests routed differently from intial requests?
SIP makes a big deal differentiating initial requests from subsequent requests. Why? Read on to find out. Learn more about Contact headers and Route Sets!
Exercises are not tests. Their purpose is to help you learn and apply. Try the hint button in the sample below if you'd like some help
Note: On smaller screens this imported exercise may not be formatted correctly For the best experience try on a larger screen
