ISOM $3180$ Assignment $3$

Please submit your answer in a docx or pdf format on canvas

Study the diagram and answer question $1$ and $2$:

Study the diagram and answer question $1$ and $2$:

$1.$ R$2$ is now set to be the DHCP server to provide IP address for all PC$1$ to PC$8.$ The first $12$ usable IP

addresses of the networks are reserved for static IP addresses. Use the pool name LAN$\_$A for the

network $10\mathrm{.}0\mathrm{.}0\mathrm{.}0,$ LAN$\_$B for the network $130\mathrm{.}0\mathrm{.}0\mathrm{.}0$ and LAN$\_$C for the network $220\mathrm{.}0\mathrm{.}0\mathrm{.}0.$ Also include

default gateway and DNS server in the DHCP assignment.

a$.$ Besides the first $12$ usable IP addresses of each network, there is one more IP address should be

excluded from DHCP pool based on the information given. What is it$?$

$2$

b$.$ Write the commands on R$2$ to set up the DHCP server based on the requirement. Also consider

part $($a$)$ answer.

c$.$ Assume your command typed on R$2$ is correct, it is found that not all PCs can get the IP addresses

from DHCP$.$

i$.$ Which PCs cannot get the IP address?

ii$.$ What is the reason for this issue from the lab experience?

iii. Write down commands to solve the problem.

$2.$ Assume all PCs got the IP address from DHCP server already.

a$.$ Assume ARP table of PC$4$ is empty. After pinging from PC$4$ to PC$6,$ what entry should be added to

PC$4$s ARP table? $($You may just refer to which PC or which router interface$)$

b$.$ What is the command to show ARP table in R$1?$

c$.$ List all of the devices or router interface that would appear in PC$8$s ARP table if all devices

communicate with each other?

d$.$ Assume all ARP tables of the devices are empty. When pinging from PC$3$ to PC$2.$ It is found that

the first ping result is $$request timed out$$ but the other $3$ ping results are successful. Explain why

with the Packet Tracer behavior

network $10\mathrm{.}0\mathrm{.}0\mathrm{.}0,$ LAN$\_$B for the network $130\mathrm{.}0\mathrm{.}0\mathrm{.}0$ and LAN$\_$C for the network $220\mathrm{.}0\mathrm{.}0\mathrm{.}0.$ Also include

default gateway and DNS server in the DHCP assignment.

a$.$ Besides the first $12$ usable IP addresses of each network, there is one more IP address should be

excluded from DHCP pool based on the information given. What is it$?$