These are two modes through which IP-sec protocol can operate inside the VPN. The transport mode does not change the IP header and is used for point-to-point tunnels. The tunnel mode encapsulates the original IP packet inside the new IP packet, creating a new IP header. Therefore this mode is used for site-to-site VPN scenarios.
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The mesh is a collection of nodes, a lighthouse, and an admin center. The user device is a node, a server is a node, cloud stack is a node, LAN access box is a node.
