Which of the following descriptions about GRE over IPSec is incorrect?

Question

Options

• AThe IP header added during the IPSec encapsulation process, that is, the source address is the
• BWhen gateways use GRE over IPSec to connect, GRE encapsulation is performed first, and then
• CThe IP header added during the GRE encapsulation process, that is, the source address is the
• DThe data flow that IPSec needs to protect is the data flow from the GRE starting point to the GRE

• A
  4% (1)
• B
  4% (1)
• C
  79% (19)
• D
  13% (3)

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