To securely transport EIGRP traffic, a network administrator will build VPNs between sites. What is the best method to accomplish the transport of EIGRP traffic?（）
- A、IPSec in tunnel mode
- B、IPSec in transport mode
- C、GRE with IPSec in transport mode
- D、GRE with IPSec in tunnel mode
正确答案:C
答案解析:有
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