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Title:- Network Scanning using NMAP in Windows Exp.No:-1 Aim:- To study NMAP Software and demonstrate using various websites. Theory:- Nmap (“Network Mapper”) is an open source tool for network exploration and security auditing. It was designed to rapidly scan large networks, although it works fine against single hosts. Nmap uses raw IP packets in novel ways to determine what hosts are available on the network, what services (application name and version) those hosts are offering, what operating systems (and OS versions) they are running, what type of packet filters/firewalls are in use, and dozens of other characteristics. While Nmap is commonly used for security audits, many systems and network administrators find it useful for…show more content…
| | | | | | Each regular host in the network is represented by a little circle. The color and size of the circle is determined by the number of open ports on the host. The more open ports, the larger the circle. A white circle represents an intermediate host in a network path that was not port scanned. If a host has fewer than three open ports, it will be green; between three and six open ports, yellow; more than six open ports, red. | | | | | If a host is a router, switch, or wireless access point, it is drawn with a square rather than a circle. | | Network distance is shown as concentric gray rings. Each additional ring signifies one more network hop from the center host. | | Connections between hosts are shown with colored lines. Primary traceroute connections are shown with blue lines. Alternate paths (paths between two hosts where a different path already exists) are drawn in orange. Which path is primary and which paths are alternates is arbitrary and controlled by the order in which paths were recorded. The thickness of a line is proportional to its round-trip time; hosts with a higher RTT have a thicker line. Hosts with no traceroute information are clustered around localhost, connected with a dashed black line. | | If there is no RTT for a hop (a missing traceroute entry), the connection is shown with a blue dashed line and the unknown host that makes the connection is shown with a blue outline. | Some
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