Give an explanation for what the word "firewall" means in terms of network security, and describe how it is employed in network topologies.

How exactly should a firewall be configured such that it adheres to the best practises?

A network security design is necessary to increase the company's level of protection and security given that the majority of the company's business operations are handled by servers that are connected to a flat network. Because the network is so flat, this is the result of why it is that way. whenever there is an establishment of a demilitarized zone and whenever there is. If you had the ability to change anything about the current structure of the network, what components of it would you change?

What exactly does it mean when we talk about the "firewall" in relation to the security of a network, and how is it implemented in different topologies?