Describe a mesh VPN topology.  What are advantages and disadvantages?

What will be an ideal response?


In a mesh configuration, all participants in the VPN have Security Associations with one another.  Two types of mesh arrangements are possible:
Full mesh-Every subnetwork is connected to all other subnets in the VPN. This topology is complex to manage and is best used with small VPNs.
Partial mesh-Any subnet in the VPN may or may not be connected to the other subnets. This configuration offers more flexibility than a full-mesh arrangement.
The advantage of a mesh configuration is that each participant can establish VPN communications with all other participants. However, if a new LAN is added to the VPN, all other VPN devices have to be updated to include information about new users. The problem with mesh VPNs is the difficulty of expanding the network and updating every VPN device
whenever a host is added.

Computer Science & Information Technology

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