What type of firewalls are in use, and other such characteristics. What operating systems they are running on, Network administrators also find it useful for tasks such as network inventory, managing service upgrade schedules, and monitoring host or service uptime. ![]() Nmap was originally designed to scan large networks, but it can work equally well for single hosts. It is an open source tool that is used widely for network discovery and security auditing. In this chapter, we will discuss in brief some of famous tools that are widely used to prevent hacking and getting unauthorized access to a computer or network system.
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