Free CheckPoint 156-215.81 (R81.20) Actual Exam Questions - Question 1 Discussion

A, since Kerberos and OTP are mostly for users, not gateway VPN auth.

A, because dynamic OTP isn’t typically used for gateway-to-gateway VPN authentication.

Maybe A’s right since Kerberos is mainly for user authentication, not gateways. Pre-shared secrets and PKI certificates are the go-to for mutual VPN gateway authentication.

Maybe D works here too because PKI certificates are definitely solid for mutual authentication, and Dynamic ID OTP could add a time-based element that some enterprise VPNs use for extra security. Pre-shared secrets (A) might be simpler but less secure. Kerberos (B and C) seems off since it’s mostly for user authentication within domains, not really for gateways talking to each other. So between A and D, D might be more modern with the OTP element added in, even if it’s less common.

Maybe A makes the most sense since pre-shared secrets and PKI are standard for VPN gateways. Kerberos and OTP methods usually target user-level auth, not gateway-to-gateway.

A vs B? Kerberos usually isn't used for gateway authentication, so A seems safer.

Probably B since Kerberos is more for user auth, so not typical for VPN gateways.

Maybe D could work if the VPN supports dynamic OTP alongside certificates, but that seems less common than the classic combo. Kerberos tickets are usually more for user auth in a domain, not gateway-to-gateway VPN authentication, so I’d probably ditch B and C. A’s still solid for most VPN setups since pre-shared keys and PKI certs are the standard ways to mutually authenticate gateways. Without more details on the VPN type or setup, A feels like the safer bet here.

Looks like A is the best fit here—pre-shared secrets and PKI certs are common for mutual VPN gateway auth. The others don’t usually pair both methods for mutual authentication.