SNMP, Simple Network Management Protocol, is used in Network Management applications like HP-Openview. It
consists of a set of messages for getting and setting configution options on
Network Elements. It also provides messages for spontaneous alarm reporting
called traps.

SOID

Sytem Object ID. Identifies SNMP object in tree structure.
Organisations can get a branch of the tree for their products.

MIB

Management Information Base. Maps SOID and options from SNMP messages
to the Management system.

Agent

Intelligence on Network Elements supporting SNMP.

Manager

Applications to send and receive SNMP messages.

A SNMP topology scan reads the ARP-cache and reqests the ARP-cache from
all nodes it finds (first from routers then from nodes).