Question $1(20$ Marks$)$:

Discuss the meaning of data communication and its components.

Question $2(20$ marks$)$

Match the following to one layer of the OSI model:

$2\mathrm{.}1.$ Interface to transmission media.

$2\mathrm{.}2.$ Provides access for the end user.

$2\mathrm{.}3.$ Reliable process$-$to$-$process message delivery.

$2\mathrm{.}4.$ Route selection

$2\mathrm{.}5.$ Defines frames.

$2\mathrm{.}6.$ Provides user services such as e$-$mail and file transfer.

$2\mathrm{.}7.$ Transmission of bit stream across the physical medium.

$2\mathrm{.}8.$ Mechanical, electrical, and functional interface.

$2\mathrm{.}9.$ Responsibility for carrying frames between adjacent nodes.

$2\mathrm{.}10.$ Establishes, manages, and terminates sessions.