Explain in details dont use chtgot

iT is a common practice in most transport protocols for control and data to be multiplexed over the same logical channel on a per$-$user$-$connection basis. An alternative is to establish a single control transport connection between each pair of communicating transport entities. This connection would be used to carry control signals relating to all user transport connections between the two entities. Discuss the implications of this strategy. Use a diagram to explain your answer. $[6]$

$2-$ Delay performance is increasingly important in support of user and application requirements. Describe why delay is important for the following applications:

$[6]$

a$)$ Voice over IP $($VoIP$)$

b$)$ Non$-$buffered $($real$-$time$)$ video or audio playback

c$)$ Teleconferencing