In today's information age the information systems play a critical role in an organizations progress. Also the availability of data is critical for the business operations. However due to globalization the data and information systems are located at different locations. Thus for data exchange or for high availability solutions these information systems are connected using networks. Thus the network and networking devices become critical assets for any organization.

Protecting networks and network devices is the most important task of implementing information security. Also the networks and systems attached to it are prone to malware attacks from various sources like viruses, trojan's, worms etc. The hackers also pose a great risk for the organization's network and the data.

Thus implementing network security is a must for all organizations.