I have been asked to design a network topology as per the given requirements in my assignment. I've already created the network topology using visio, but I am not sure if its correct. So I need someone to have a look at it.
No. This site is to help people having problems and seeking answers about their PC. If you need help on your homework then you should look for a site more catered to your needs.
On the other hand, if they are questions based on programs (for instance powerpoint) then I'm sure you can ask them here.