Fahmi Rizwansyah says:
Network Monitoring
The purpose of network monitoring is the collection of useful information from various parts of the network so that the network can be managed and controlled using the collected information. Most of the network devices are located in remote locations and they usually don't have directly connected terminals. Hence specialized tools are required to facilitate the network management application to monitor their status easily.
Bandwidth management
Heavy downloading can take its toll on network performance. Congestion and lack of responsiveness are often the result of large amounts of traffic being used by a small number of users. Sometimes even a single user can bring an entire network to a crawl as the internet gateway gets flooded with network traffic. By using Bandwidth management tools, the administrator can have full control over the network using tools to allocate desired bandwidth to specified users for specified tasks.
Traffic Analysis
Traffic analysis is the Inference or deduction of useful intelligence from patterns of observable characteristics of data flow(s), even when the data is encrypted or otherwise not directly available. The characteristics used for the evolution of such patterns include the identities and locations of the source(s) and destination(s), and the presence, amount, frequency, and duration of occurrence.
Penetration Testing
The portion of security testing in which the evaluators attempt to circumvent the security features of a system. The evaluators may be assumed to use all system design and implementation documentation, that may include listings of system source code, manuals, and circuit diagrams. The evaluators work under the same constraints applied to ordinary users. Ethical Hacking of a commissioned system is an integral part of penetration testing.
Vulnerability Analysis
Vulnerability analysis is the systematic examination of an AIS (Automated Information System for acquisition, storage, manipulation, control, display, transmission, or reception of data etc.) or product to determine the adequacy of security measures, identify security deficiencies, provide data from which to predict the effectiveness of proposed security measures, and confirm the adequacy of such measures after implementation.
Network audit
It is the process of assessing the various components and the operating environment of a computer network for vulnerabilities and other loopholes that might occur in the process of installing, configuring, or securing the network. This process may range from a relatively simple Automated audit to check a network for known vulnerabilities in the operating system through a black box or even a white box or manual audit to determine the network's overall status as compared to the prevailing "best practice".
Cheers, frizzy2008.