Which of the following is a framework of open standards developed by the Internet
Engineering Task Force (IETF) that provides secure transmission of the sensitive data over
an unprotected medium, such as the Internet?

A.
DNSSEC

B.
Netsec

C.
IKE

D.
IPsec

Explanation:

Reference:
http://www.cisco.com/c/en/us/td/docs/net_mgmt/vpn_solutions_center/20/ip_security/provisio
ning/guide/IPsecPG1.html