Toyota Company, a prominent Japanese enterprise headquartered in Tokyo, is experiencing rapid growth

and aims to expand its business globally, including cities within Japan and Sydney, Australia. As an IT

specialist, your task is to design and implement a robust network infrastructure to support Toyota Company's

ambitious expansion plans. This assignment challenges you to address various technical and security

challenges while adhering to industry best practices in networking and cybersecurity.

design a scalable and efficient network topology that connects Toyota Company's

headquarters in Tokyo with its branches in Kyushu, Hokkaido, and Sydney, Australia. Consider factors such

as inter$-$branch communication, Internet connectivity, and ease of management. You are required to provide

a detailed network diagram and rationale for the chosen topology.

There are $5$ sets of user allocations for this scenario:

Set $1$:

Tokyo building $(37000$ users$),$ Kyushu building $(25000$ users$),$ Hokkaido building $(17000$ users$)$ and Sydney

building $(14200$ users$)10\mathrm{.}16.$XY$\mathrm{.}0/8$

Set $2$:

Tokyo building $(42000$ users$),$ Kyushu building $(26000$ users$),$ Hokkaido building $(19000$ users$)$ and Sydney

building $(16200$ users$)$ with the private IP address of $10\mathrm{.}32.$XY$\mathrm{.}0/8$

Set $3$:

Tokyo building $(53000$ users$),$ Kyushu building $(12000$ users$),$ Hokkaido building $(18700$ users$)$ and Sydney

building $(6300$ users$)$ with the private IP address of $10\mathrm{.}43.$XY$\mathrm{.}0/8$

Set $4$:

Tokyo building $(92000$ users$),$ Kyushu building $(33000$ users$),$ Hokkaido building $(19200$ users$)$ and Sydney

building $(17400$ users$)$ with the private IP address of $10\mathrm{.}65.$XY$\mathrm{.}0/8$

Set $5$:

Tokyo building $(36600$ users$),$ Kyushu building $(20600$ users$),$ Hokkaido building $(18320$ users$)$ and Sydney

building $(16725$ users$)$ with a private IP address of $10.110.$XY$\mathrm{.}0/8$

There are $5$ sets of IP addresses.

$$ For those students who have the last digits of student ID $0$ or $5($Set $1)$

$$ For those students who have the last digits of student ID $1$ or $6($Set $2)$

$$ For those students who have the last digits of student ID $2$ or $7($Set $3)$

$$ For those students who have the last digits of student ID $3$ or $8($Set $4)$

$$ For those students who have the last digits of student ID $4$ or $9($Set $5)$

Note: XY is the last $2$ numbers in your student's ID$.$