Summary

In this chapter, we talked about network architecture and the structure of an organization's network. We talked about the data center, which holds the organization's network, the user network, which the users connect to, and the core network, which connects everything. We also talked about the perimeter, which is the connection from the organization to the world.

Then, we talked about network virtualization in SDN and NFV, the advantages of these networks and their risks, and cloud services and how to connect to them.

After that, we talked about the risks that can occur at every point; risks can arise from attacks coming from the internet, from attacks on the organization's servers, attacks on network devices, and attacks on and from the wireless networks.

In the next chapter, we will talk about the network protocols that implement the topologies we talked about in this chapter, where they are implemented, and the potential risks of each.