Sets up a point-to-point connection between two computer systems over an internet protocol (ip) network. a. point-to-point tunneling protocol (pptp) b. accounting layer 2 tunneling protocol (l2tp) c. internet security association and key management protocol (isakmp)

The correct answer is PPTP.

Explanation:

PPTP is the protocol that is used to create a connection which is referred to as tunnel and it transports data between two systems over the internet while also securing it with encryption. I hope this answer helps.

the answer is d underlined.