My community centre has a public computer center. I am pretty sure that it's connected in a star topology with some switch in the center. It also have a proxy server which we need to enter a username and password to access the internet. The username and password can be requested from the service counter near the public computer center.
My question is that how might somebody using the community centre's computer do a MiTM attack on me also using the community centre's computer. Secondly, how might I be able to protect myself from such attacks.