Summary 

The process of designing a secure network requires identifying an insecure area, understanding the methods of network attacks and the best solutions to meet the needs of a business. The four fundamental technical requirements of network design are scalability, availability, security, and manageability.

We discussed the importance of using the right approach to safeguard against security threats in an increasingly internet oriented world. We also covered the security weaknesses for all networking layers including routers, switches, firewall configuration systems and risks when connected to the internet. We have also learnt the best security methods and how to protect the network from vulnerabilities, threats and attacks by applying security configurations.

In the next chapter, we will discuss more about server security, encryption methods and policy enforcement with regards to data protection.