$($a$)($i$)$ State the two types of routing in data networks.

$($ii$)$ Describe each of the following types of routing protocols:

Open Shortest Path First $($OSPF$)$;

II$.$ Routing Information Protocol $($RIP$).$

$(8$ marks$)$

$($b$)$ An organization would like to subnet its network with IP address $220\mathrm{.}17\mathrm{.}19\mathrm{.}0$ to obtain $32$ separate networks:

$($i$)$ obtain the subnet mask;

$($ii$)$ determine the:

I. subnet addresses of the first two subnets;

II$.$ broadcast addresses of the first two subnets;

III. host addresses of the first subnet.

$(12$ marks$)$

$($a$)$ State three types of keys used in network security.

$(3$ marks$)$

$($b$)$ With the aid of a block diagram, describe digital signature technique as used in network security.

$(9$ marks$)$

$($c$)$ Outline the steps followed in Planning and implementing a wireless LAN.

$(8$ marks$)$