| Exam 300-101 | Question id=510 | VPN Technologies |
An engineer is configuring a GRE tunnel interface in the default mode. The engineer has assigned an IPv4 address on the tunnel and sourced the tunnel from an Ethernet interface. Which option also is required on the tunnel interface before it is operational?
| A. |
tunnel destination address | |
| B. |
keepalives | |
| C. |
IPv6 address | |
| D. |
tunnel protection |