VPNs (or Virtual Private Networks) are largely understood as a concept by many who are using networked connections that may involve sending and receiving sensitive data. Dynamic Multiple VPN, such as Cisco DMVPN, works to encrypt transmitted data much like a regular VPN. However, they do it in a way that can secure communications between branch offices in particular. It does this using a centralized architecture to provide easier implementation and management for deployments across the entire IT scope of the organization.
DMVPN Benefits 
Understanding DMVPN 
DMVPN allows data exchanges on a secure network without the use of a headquarter’s VPN server or router. While a VPN acts as a connector between remote sites and HQ, or between different branches, the DMVPN creates a mesh VPN protocol that can be applied selectively to connections being utilized in the business already. Each different site (or spoke) can connect to one another securely. This is done using VPN firewall concentrators and routers, with DMVPN configuration on the routers in place at remote sites to allow the DMVPN mesh to be applied to the connection that it’s making at the time.
There is a range of benefits of using DMVPN over a permanent VPN, or in the case of DMVPN vs MPLS networks. The following are some of the most commonly cited benefits:
DMVPN Phases
mesh vpn

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