<s>
Netdisco	B-Protocol
is	O
a	O
network	O
management	O
tool	O
suitable	O
for	O
small	O
to	O
very	O
large	O
networks	O
.	O
</s>
<s>
IP	B-Protocol
address	I-Protocol
and	O
MAC	O
address	O
data	O
is	O
collected	O
into	O
a	O
PostgreSQL	O
database	O
using	O
SNMP	B-Protocol
,	O
CLI	O
,	O
or	O
device	O
APIs	O
.	O
</s>
<s>
It	O
allows	O
network	O
administrators	O
to	O
locate	O
the	O
exact	O
switch	B-Protocol
port	I-Protocol
of	O
any	O
node	B-Protocol
connected	O
to	O
the	O
network	O
.	O
</s>
<s>
Netdisco	B-Protocol
utilizes	O
SNMP	B-Protocol
to	O
fetch	O
ARP	O
tables	O
from	O
routers	B-Protocol
and	O
MAC	O
tables	O
from	O
layer	B-Protocol
2	I-Protocol
switches	O
.	O
</s>
<s>
If	O
Cisco	B-Protocol
Discovery	I-Protocol
Protocol	I-Protocol
,	O
Link	B-Protocol
Layer	I-Protocol
Discovery	I-Protocol
Protocol	I-Protocol
,	O
Foundry	O
Discovery	O
Protocol	O
or	O
SynOptics	B-Protocol
Network	I-Protocol
Management	I-Protocol
Protocol	I-Protocol
is	O
available	O
,	O
discovery	O
of	O
the	O
network	B-Architecture
topology	I-Architecture
is	O
mostly	O
automatic	O
.	O
</s>
<s>
In	O
case	O
the	O
above-mentioned	O
protocols	O
are	O
not	O
enabled	O
(	O
for	O
example	O
due	O
to	O
incompatibilities	O
between	O
the	O
network	O
devices	O
or	O
for	O
security	O
reasons	O
)	O
the	O
topology	B-Architecture
can	O
be	O
defined	O
manually	O
.	O
</s>
<s>
A	O
record	O
is	O
maintained	O
of	O
the	O
IP	B-Protocol
addresses	I-Protocol
and	O
ports	O
each	O
node	B-Protocol
has	O
used	O
.	O
</s>
<s>
Netdisco	B-Protocol
was	O
created	O
at	O
the	O
University	O
of	O
California	O
,	O
Santa	O
Cruz	O
(	O
UCSC	O
)	O
,	O
Networking	O
and	O
Technology	O
Services	O
(	O
NTS	O
)	O
department	O
in	O
2003	O
by	O
Max	O
Baker	O
,	O
with	O
significant	O
contributions	O
from	O
Mark	O
Boolootian	O
and	O
Jim	O
Warner	O
(	O
through	O
whose	O
ideas	O
Netdisco	B-Protocol
was	O
born	O
and	O
shaped	O
)	O
,	O
Bill	O
Fenner	O
,	O
and	O
Eric	O
Miller	O
.	O
</s>
