Netowork Monitoring and managed services is nothig new. However as Lan/Wan matures the relaibility of the service is becoming critical. In this section we will explore SMTP/Managed services and deploymnt consideration for LAN/WAN in a mixed evvironment.

References
1.0 Nagios
www.nagios.org
2.0 SMTP- Oriely Books on SMTP
http://books.google.com/books?id=65_0d25EpB4C&printsec=frontcover&dq=snm...
3.0 Comparison of Various Network Monitoring Systems
http://en.wikipedia.org/wiki/Comparison_of_network_monitoring_systems
4.0 Help Desk Software
http://dojotoolkit.org/
5.0 Spice Works
www.spiceworks.com
6.0 Ground Works
http://www.groundworkopensource.com/
7.0 Zenoss
http://www.zenoss.com/