<s>
L2F	B-Protocol
,	O
or	O
Layer	O
2	O
Forwarding	O
,	O
is	O
a	O
tunneling	B-Protocol
protocol	I-Protocol
developed	O
by	O
Cisco	O
Systems	O
,	O
Inc	O
.	O
to	O
establish	O
virtual	B-Application
private	I-Application
network	I-Application
connections	O
over	O
the	O
Internet	O
.	O
</s>
<s>
L2F	B-Protocol
does	O
not	O
provide	O
encryption	O
or	O
confidentiality	O
by	O
itself	O
;	O
It	O
relies	O
on	O
the	O
protocol	O
being	O
tunneled	O
to	O
provide	O
privacy	O
.	O
</s>
<s>
L2F	B-Protocol
was	O
specifically	O
designed	O
to	O
tunnel	O
Point-to-Point	B-Protocol
Protocol	I-Protocol
(	O
PPP	B-Protocol
)	O
traffic	O
.	O
</s>
<s>
RFCs	O
prior	O
to	O
2341	O
have	O
specified	O
protocols	O
for	O
supporting	O
IP	O
dial-up	O
via	O
SLIP	B-Protocol
and	O
multiprotocol	O
dial-up	O
via	O
PPP	B-Protocol
.	O
</s>
