Network Segregation and Isolation of IP Spaces

D.

A virtual area network (VLAN) allows the logical separation and isolation of networks and IP spaces to provide enhanced security and controls.

The networking concept in a cloud environment that allows for network segregation and isolation of IP spaces is VLAN, as option D states.

VLAN (Virtual Local Area Network) is a technology that enables the creation of logical networks in a physical network infrastructure. By implementing VLANs, it is possible to group network devices, servers, and applications into separate logical networks, even if they are physically located on the same network infrastructure. This can help to improve security, optimize traffic flow, and simplify network management.

In a cloud environment, VLANs are used to separate and isolate IP spaces between different users or tenants. This allows each user or tenant to have their own virtual network with their own IP address space, routing, and security policies. By using VLANs, cloud providers can offer secure and isolated network services to their customers, ensuring that each customer's data and applications are protected and isolated from other users.

VLANs work by adding a special tag to each network packet, indicating which logical network it belongs to. Switches and routers use this tag to forward the packet only to devices that belong to the same VLAN. This way, devices that belong to different VLANs cannot communicate with each other unless a router or firewall allows it.

In conclusion, VLANs are a powerful networking concept that enables network segregation and isolation of IP spaces in a cloud environment. They provide a secure and efficient way to manage network resources, protect customer data, and ensure reliable and scalable network services.