Which of the following protocols encapsulates an IP packet with an additional IP header?

Which of the following protocols encapsulates an IP packet with an additional IP header?

A.
SFTP

B.
IPSec

C.
HTTPS

D.
SSL

Explanation:
Authentication Header (AH) is a member of the IPsec protocol suite. AH operates directly on top of
IP, using IP protocol number 51.