<s>
The	O
Dynamic	B-Protocol
Trunking	I-Protocol
Protocol	I-Protocol
(	O
DTP	O
)	O
is	O
a	O
proprietary	O
networking	O
protocol	O
developed	O
by	O
Cisco	O
Systems	O
for	O
the	O
purpose	O
of	O
negotiating	O
trunking	O
on	O
a	O
link	O
between	O
two	O
VLAN-aware	O
switches	B-Protocol
,	O
and	O
for	O
negotiating	O
the	O
type	O
of	O
trunking	O
encapsulation	B-Protocol
to	O
be	O
used	O
.	O
</s>
<s>
It	O
works	O
on	O
Layer	B-Protocol
2	I-Protocol
of	O
the	O
OSI	O
model	O
.	O
</s>
<s>
VLAN	B-General_Concept
trunks	O
formed	O
using	O
DTP	O
may	O
utilize	O
either	O
IEEE	O
802.1Q	O
or	O
Cisco	B-Protocol
ISL	I-Protocol
trunking	O
protocols	O
.	O
</s>
<s>
DTP	O
should	O
not	O
be	O
confused	O
with	O
VTP	B-Protocol
,	O
as	O
they	O
serve	O
different	O
purposes	O
.	O
</s>
<s>
VTP	B-Protocol
communicates	O
VLAN	B-General_Concept
existence	O
information	O
between	O
switches	B-Protocol
.	O
</s>
<s>
Neither	O
protocol	O
transmits	O
the	O
data	B-Protocol
frames	I-Protocol
that	O
trunks	O
carry	O
.	O
</s>
<s>
The	O
following	O
switch	B-Protocol
port	I-Protocol
mode	O
settings	O
exist	O
:	O
</s>
<s>
The	O
port	O
will	O
not	O
send	O
out	O
DTP	O
frames	B-Protocol
or	O
be	O
affected	O
by	O
any	O
incoming	O
DTP	O
frames	B-Protocol
.	O
</s>
<s>
If	O
you	O
want	O
to	O
set	O
a	O
trunk	O
between	O
two	O
switches	B-Protocol
when	O
DTP	O
is	O
disabled	O
,	O
you	O
must	O
manually	O
configure	O
trunking	O
using	O
the	O
(	O
switchport	O
mode	O
trunk	O
)	O
command	O
on	O
both	O
sides	O
.	O
</s>
<s>
The	O
configured	O
switch	B-Protocol
port	I-Protocol
mode	O
setting	O
is	O
referred	O
to	O
as	O
the	O
port	O
's	O
trunking	O
administrative	O
mode	O
.	O
</s>
