Which option describes the purpose of the shared argument in the DMVPN interface command
tunnel protection IPsec profile ProfileName shared?

A.
shares a single profile between multiple tunnel interfaces
B.
allows multiple authentication types to be used on the tunnel interface
C.
shares a single profile between a tunnel interface and a crypto map
D.
shares a single profile between IKEv1 and IKEv2
“The Sharing IPsec with Tunnel Protection feature allows an IP Security (IPsec) Security Association Database (SADB) to be shared between two or more generic routing encapsulation (GRE) tunnel interfaces when tunnel protection is used. These tunnel interfaces share a single underlying cryptographic SADB, cryptographic map, and IPsec profile in the Dynamic Multipoint Virtual Private Network (DMVPN) configuration.” – http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/sec_conn_dmvpn/configuration/xe-3s/sec-conn-dmvpn-xe-3s-book/sec-conn-dmvpn-share-ipsec-w-tun-protect.html
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