Network Security Group
A Network Security Group (NSG) is a cloud-based network filtering tool that acts as a virtual firewall to control inbound and outbound traffic for Azure resources. It uses rules to allow or deny network traffic based on source/destination IP addresses, ports, and protocols. NSGs are essential for implementing network segmentation and security in cloud environments like Microsoft Azure.
Developers should learn NSGs when building secure applications on Azure to enforce network-level security policies and protect resources from unauthorized access. They are crucial for scenarios like isolating virtual machines, securing web applications, and complying with regulatory requirements by restricting traffic flow. NSGs provide a scalable way to manage security in dynamic cloud infrastructures without physical hardware.