Question $1$

$($a$)$ You are appointed as a Manager for the Research and Development Center. As part of your report, explain the roles of any THREE $(3)$ standard organizations that are actively involved in networking and telecommunication areas.

$(9$ marks$)$

$($b$)$ Discuss with a diagram any FOUR $(4)$ functions of Transmission Control Protocol$/$Internet Protocol $($TCP$/$IP$)$ models and a key difference with the Open System Interconnection $($OSI$)$ model.

$(10$ marks$)$

$($c$)$ Explain TWO $(2)$ approaches of digital signal transmission.

$(6$ marks$)$