Azure Network Security Groups (NSGs) for defining inbound and outbound traffic rules based on source and destination IP addresses, ports, and protocols.

Azure Virtual Network Peering for connecting multiple virtual networks to enable communication between resources in different virtual networks.

Azure VPN Gateway for establishing secure, cross-premises connectivity between your Azure virtual network and your on-premises infrastructure.

Azure ExpressRoute for creating private connections between Azure datacenters and infrastructure on your premises or in a colocation environment.

Azure Firewall for providing high-level security and network traffic filtering capabilities across multiple virtual networks and subscriptions.