Which of the following integrity security mechanisms ensures that a sent message has been received intact, by the intended receiver?

a. ipsec
b. sha
c. des
d. crc

Option A i.e., IPSEC is the correct option.

Explanation:

Because Internet Protocol security is the security of the Internet Protocol that make secure the sent message by sender and which has been received intact by the receiver which is intended to receive the message. Internet Protocol Security uses the Internet Protocol version 4 and the Internet Protocol version 6. So, that's why the following option is correct.