Therefore, it is interesting to know if todays customary hardware and software are able to keep up with the network in terms of throughput of packet data. Most network security tools-particularly network intrusion detection systems-have these demands. This holds especially for applications where full packets (headers and data) are needed and packet loss is unwanted. 'Packet capturing in contemporary high-speed networks like Giga- bit Ethernet is a challenging task when using commodity hard- ware. This paper presents a comparative analysis of some present packet sniffers with their functioning. A number of tools are accessible to help administrators to monitor and evaluation of network traffic in network. Traffic monitoring and analysis is very important in order to more efficiently troubleshoot and solve issues when they happen. Network monitoring for a commercial network is a analytical IT function that can save money in network functioning, employee efficiency and organization cost overruns. These paper emphases on the comparative study of diverse packet analyzers, that are accessible in current market and how we can select amongst them rendering to our necessities. These packets assist us to comprehend when there are prominent security or presentation procedures occurring on the network and also to find out collective network complications such as loss of connectivity and slow network etc. A significant numbers of them are of malicious focused.

In modern days there are more than billions of packets moving throughout the web sky. Network monitoring systems are operated to confirm availability and inclusive enactment of computers and network facilities. As network persist to grow,it isvery important that network administrators are responsive of the various types of traffic that is navigating their networks ,and offers appropriate resources for decision making system.

Network monitoring signifies to the practice of managing the procedure of a computer network using specified management software tools.

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