642-902 New Questions

642-902 Q&A – New Questions (March 2012) (1-5)

Section 8 – New Questions (March 2012)

What two features are benefits of using GRE tunnels with IPsec over using IPsec tunnel alone for building site-to-site VPNs? (Choose two.)
A.    allows dynamic routing securely over the tunnel
B.    IKE keepalives are unidirectional and sent every ten seconds
C.    reduces IPsec headers overhead since tunnel mode is used
D.    supports non-IP traffic over the tunnel
E.    uses Virtual Tunnel Interface (VTI) to simplify the IPsec VPN configuration
Answer: AD

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