Secure Network Architecture Concepts

We are going to look at secure network architecture and we will begin by looking at network appliances, starting with software-defined networks.

Software-Defined Network

Traditional networks route packets via a hardware router and are decentralized. However, in today's networks, more and more people are using virtualization, including cloud providers. A Software-Defined Network (SDN) is where packets are routed through a controller rather than traditional routers, which improves performance.

Securing networks and protecting them is vital to protecting a company's assets. We use different zones and topologies, network separation and segmentation, and install firewalls to prevent unauthorized access to the network.

First of all, let's look at the different zones and topologies. There are three main zones: LAN, WAN, and screened subnet:

• Local Area Network (LAN): A secure network with very fast links and a web server...