If this network belonged to a company which used this network on a regular basis, the company would lose the function to send information internally to other departments.

Malicious (or ' black-hat') hackers can, on entry of the network, get to security-sensitive information or corrupt the network making it useless. Ethical hackers often also use the information to remove the glitches and strengthen their network. If there is a vulnerability with the security of the network, it will send a report back to a hacker who may use this info to exploit that network glitch to gain entry to the network or for other malicious activities. This type of program scans networks for vulnerabilities in the security of that network. The next stage of enumeration is to fingerprint the operating system of the remote host.Ī network enumerator or network scanner is a computer program used to retrieve usernames and info on groups, shares, and services of networked computers. It may also scan various ports on remote hosts for looking for well known services in an attempt to further identify the function of a remote host. Network enumeration tends to use overt discovery protocols such as ICMP and SNMP to gather information. Network enumeration is the discovery of hosts or devices on a network. It should not be confused with network mapping, which only retrieves information about which servers are connected to a specific network and what operating system runs on them. Network enumeration is a computing activity in which usernames and info on groups, shares, and services of networked computers are retrieved.

How to use nessus enum