Kurose and Ross Edition 6 Exercise 3 Question R5 (Page No 286)

Question

Why is it that voice and video traffic is often sent over TCP rather than UDP in today’s Internet? (Hint: The answer we are looking for has nothing to do with TCP’s congestion-control mechanism.)

Answer 1

Answer: It is done just because the TCP leads to $10\%$ delivery of the data.

Answer 2

Since most firewalls are configured to block UDP traffic, using TCP for video and voice traffic lets the traffic though the firewalls.