Question $4$

Figure Q$4$ shows the network topology of a company.

Figure $04$

Analyse the behaviour of network protocols by answering the following:

$($a$)$ Assume that all the routers in the network shown in Figure Q$4$ are enabled with only

Open Shortest Path First $($OSPF$)$ routing protocol. The links are labelled with link cost

between two adjacent routers.

$($i$)$ Copy Table Q$4($a$)$ to your answer script and use the format given in the table to

obtain the Shortest Path First $($SPF$)$ table for Router A$.$

Table $04($a$)$

$($ii$)$ From the information in Q$4($a$)($i$),$ draw the Shortest Path First $($SPF$)$ Tree for

Router A$.$

$($b$)$ Assume that all the routers in the network shown in Figure Q$4$ are enabled with only

Routing Information Protocol version $2($RIPv$2)$ routing protocol. Write down the

router configuration commands to be entered on all the routers to achieve reachability

in the entire network.

$($c$)$ Assume all the routers are configured with RIPv$2$ routing protocol, and it is desired to

have backup static routes for PC$1$ to reach PC$2$ and vice versa via Routers A$,$ B and E$.$

Give the configuration command$($s$)$ to set up the static routes and indicate the router$($s$)$

where the commands are implemented.