Authentication Header (AH) and Encapsulating Security Payload (ESP) 

Authentication Header (AH): It provides authentication and integrity but no confidentiality to the traffic flowing between sender and receiver.
Encapsulation Security Protocol (ESP): It provides authentication, integrity and confidentiality to the traffic flowing between sender and receiver.
We discuss about AH and ESP in this video.
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#encapsulatingsecuritypayload
#ahandesps