Answer question number $5.$ attach ing question $4$ also as it has dependency.

$4$: An organization is assigned a classl. Show table at nats while P$1,$ P$2,$ P$3,$ P$4$ pass. $[15]$ subnets for four departments: A$,$ B$,$ C$,$ Os block. One address of the block is $20\mathrm{.}15\mathrm{.}10\mathrm{.}0/25.$ The organization wants to create four connected through router RI$.$ Departments C D$.$ Each department has a maximum of $8$ nodes to connect. Departments A and B are router Risp. R$1,$ R$2,$ and Rg are connected the are connected through router R$2.$ Router Rg is connected to the internet through ISP

i$.$ The subnet mask & the subnet ad through a switch SI$.$ Determine

ii$.$ The routing table of router Risp, Ress of A$,$ B$,$ C$,$ and D$.$ Network address of organization.

iii. Show the flow

$($iv$)$ Show the topology of the network anost H of department B up to Risp if P has destination address $204\mathrm{.}144\mathrm{.}55\mathrm{.}6$ of internet.

$($v$)$ Show how the Switch

$5$: When a host knows the IP address of the destination but not its physical address, Which protocol is used to find the physical address? In Question $4,$ consider router R$1$ with IP address $20\mathrm{.}15\mathrm{.}10\mathrm{.}17$ and Ethernet physical address $33445566.$ The router R$1$ has received a packet for the destination host H $.$ Let host H have IP address $20\mathrm{.}15.10\mathrm{.}18($it is in the same Subnet as the RI interface towards H$)$ and has the Ethernet physical address AA$66$BB$77.$ How router R$1$ will know the IP address of Host H$?$ and then the physical address of H $?[5]$