What was used to obtain this output?

While reviewing the results of a scan run against a target network you come across the following:
What was used to obtain this output?

A.
An SNMP walk

B.
Hping2 diagnosis

C.
nmap protocol/portscan

D.
A Bo2k system query

Explanation:
The snmpwalk command is designed to perform a sequence of chained GETNEXT requests automatically, rather than having to issue the necessary snmpgetnext requests by hand. The command takes a single OID, and will display a list of all the results which lie within the subtree rooted on this OID.