What happens if two VPN Gateways are members of different VPN Communities?

The correct answer isD, assuming the question means the two gateways are expected to form a direct tunnel while they are not members of a common VPN Community. In Check Point Site-to-Site VPN, VPN Communities define the gateways that share VPN settings and determine which members can establish tunnels. If two gateways are placed only in different communities and have no shared VPN community relationship, there is no valid community context for direct VPN negotiation between them. Option A is fabricated; there is no “higher random number wins” selection logic for choosing a community. Options B and C are also wrong because Check Point does not resolve different community membership by automatically choosing weaker or stronger encryption algorithms. Encryption settings are negotiated within the configured VPN community and peer capabilities, not across unrelated communities. The cleaner design is to put peer gateways that must directly tunnel into the same Mesh or Star community, or route through a valid shared hub design where the community topology supports it. Reference topic:VPN Communities / Star and Mesh Topologies.

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