Which of the following technologies has been developed to support TCP/IP networking over lowspeed serial interfaces?

A.
ISDN

B.
SLIP

C.
xDSL

D.
T1

Explanation:
SLIP, Serial Line IP, is a currently a de facto standard, commonly used for point-to-point serial
connections running TCP/IP.
Reference: http://tools.ietf.org/html/rfc1055