<s>
Simple	B-Protocol
Gateway	I-Protocol
Monitoring	I-Protocol
Protocol	I-Protocol
(	O
SGMP	B-Protocol
)	O
defined	O
in	O
,	O
allows	O
commands	O
to	O
be	O
issued	O
to	O
application	O
protocol	O
entities	O
to	O
set	O
or	O
retrieve	O
values	O
(	O
integer	O
or	O
octet	O
string	O
types	O
)	O
for	O
use	O
in	O
monitoring	O
the	O
gateways	O
on	O
which	O
the	O
application	O
protocol	O
entities	O
reside	O
.	O
</s>
<s>
Messages	O
are	O
exchanged	O
using	O
UDP	B-Protocol
and	O
utilize	O
unreliable	O
transport	O
methods	O
.	O
</s>
<s>
Authentication	O
takes	O
place	O
on	O
UDP	B-Protocol
port	O
153	O
.	O
</s>
