Which of the following protocols replaced SLIP?

A.
IPSec

B.
L2TP

C.
L2F

D.
PPP

Explanation:
Point-to-Point Protocol (PPP) replaced SLIP because it offers more
capabilities such as error correction, better support of authentication,
encapsulation of protocols other than IP, and compression of header information.
Both protocols are encapsulation protocols used to carry data over serial lines.

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