1. How Network Management
Systems Work
 Simple Network Manegement Protocol (SNMP)
 Management Information Base (MIB)
 TCP/IP (Transmission Control Protocol/Internet
Protocol)
 Network Switch

2. Simple Network Manegement
Protocol (SNMP)
A set of protocols for managing complex networks. The
first versions of SNMP were developed in the early 80s.
SNMP works by sending messages, called protocol data
units (PDUs), to different parts of a network. SNMP-
compliant devices, called agents, store data about
themselves in Management Information Base (MIB) and
return this data to the SNMP requesters.

3. Management Information Base
(MIB)
A database of objects that can be monitored by a
network management system. Both SNMP and RMON
use standardized MIB formats that allows any SNMP and
RMON tools to monitor any device defined by a MIB.

4. TCP/IP (Transmission Control
Protocol/Internet Protocol)
TCP/IP is the basic communication language or protocol
of the Internet. It can also be used as a communications
protocol in a private network (either an intranet or an
extranet). When you are set up with direct access to the
Internet, your computer is provided with a copy of the
TCP/IP program just as every other computer that you
may send messages to or get information from also has a
copy of TCP/IP.

5. Network Switch
The network switch, packet switch (or just switch) plays
an integral part in most Ethernet local area networks
(LANs). Mid-to-large sized LANs contain a number of
linked managed switches.

6. References
 Wikipedia
http://en.wikipedia.org/
 Webopedia
http://www.webopedia.com/
 IT 用語辞典
http://e-words.jp/