Port scanning is the act of systematically scanning a computer's ports. Since a port is a place where information goes into and out of a computer, port scanning identifies open doors to a computer. Port scanning has legitimate uses in managing networks, but port scanning also can be malicious in nature if someone is looking for a weakened access point to break into your computer.
2. What is the goal of port scanning?
Although The main purpose of port scanning is to find out as much information as you can on the target in order to see if there are any known vulnerabilities, port scanning has legitimate uses in managing networks, port scanning can be malicious in nature if someone is looking for a weakened access point to break into your computer.
3. Would you prefer an open source or proprietary port scanning software?
Open source. It’s actually easier to deal with a bug fix for open source than it is for proprietary software. In open source, bugs are typically submitted to an online issue tracking system, which is public to any user. For simple everyday support issues there really isn’t much difference between open source support and proprietary software support.
4. What port scanning software would you recommend to your Senior Administrator? Explain why.
Nmap ("Network Mapper") is a free and open source utility for network discovery and security auditing. Many systems and network administrators also find it useful for tasks such as network inventory, managing service upgrade schedules, and monitoring host or service uptime. Nmap uses raw IP packets to determine what hosts are available on the network, what services those hosts are offering, what operating systems they are running, what type of packet filters/firewalls are in use, and dozens of other characteristics. It was designed to rapidly scan large networks, and also works against single hosts. Nmap runs on all major computer operating systems, Linux, Windows, and Mac OS