What is the primary function of network security groups within a networked environment?
To physically isolate networked computers
To control traffic to and from network resources based on security rules
To assign IP addresses to devices on the network
To encrypt data transmissions over the network
Network security groups are used primarily to control inbound and outbound traffic based on a set of security rules. These rules determine which traffic is allowed to or from network interfaces in virtual networks. It is essential for ensuring that only authorized network traffic can access resources, thus providing a layer of protection against unauthorized access and attacks. Unlike VLANs, which segment networks at Layer 2, or firewalls, which can perform deep packet inspection, network security groups provide basic Layer 3/4 filtering with simple allow/deny rules.
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