Which three features are benefits of using GRE tunnels in conjunction with IPsec for building site-to-site VPNs?()
- A、allows dynamic routing over the tunnel
- B、supports multi-protocol (non-IP) traffic over the tunnel
- C、reduces IPsec headers overhead since tunnel mode is used
- D、simplifies the ACL used in the crypto map
- E、uses Virtual Tunnel Interface (VTI) to simplify the IPsec VPN configuration
正确答案:A,B,D
答案解析:有
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