Which of the following is a disadvantage of PPTP?

A.
Only works over IP

B.
Comes bundled with the operating system

C.
Easy to configure a new link

D.
It is free

Explanation:
This might be a negligible disadvantage in today, but it should be
recognized that the more recently developed tunneling protocol, L2TP, allows for
tunneling over IPX and SNA as well as TCP/IP.