It is considered a best practice to use the Dead Peer Detection (DPD) feature with which VPN topologies?（）
- A、IPSec
- B、IPSec with GRE
- C、DMVPN
- D、EZVPN
- E、all of the choices
正确答案:E
答案解析:有
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It is considered a best practice to use the Dead Peer Detection (DPD) feature with which VPN topologies?（）
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