Answer:
Banner Grabbing
Explanation:
Banner grabbing is a reconnaissance technique to retrieve information about a computer or about a network and its services. This is used by administrators to take inventory of systems and services on their network.
Banner grabbing is used to gain information about a remote server and is intruders sometimes use this technique to retrieve information about remote servers. divulge software version numbers and other system information on network hosts. This is a technique of getting software banner information. This information may include operating system information, version and certain services and this helps hackers to attack the network. Banner grabbing can disclose vulnerable applications which can result in service misuse and exploitation.
Banner grabbing is done manually or automatically by using tools. Tools commonly used to perform banner grabbing are Telnet, Wget, nmap, zmap and Netcat etc.
