The nmap utility, also commonly known as port scanner, is used to view the open ports on a Linux computer. It is used by administrators to determine which services are available for external users. This utility helps administrators in deciding whether to disable the services that are not being used in order to minimize any security risk. Answer: B is incorrect. NSLOOKUP is a tool for diagnosing and troubleshooting Domain Name System (DNS) problems. It performs its function by sending queries to the DNS server and obtaining detailed responses at the command prompt. This information can be useful for diagnosing and resolving name resolution issues, verifying whether or not the resource records are added or updated correctly in a zone, and debugging other server-related problems. This tool is installed along with the TCP/IP protocol through the Control Panel.
Answer: C is incorrect. NETSH is a command line tool to configure TCP/IP settings such as the IP address, Subnet Mask, Default Gateway, DNS, WINS addresses, etc. Answer: A is incorrect. L0phtcrack is a tool which identifies and remediate security vulnerabilities that result from the use of weak or easily guessed passwords. It recovers Windows and Unix account passwords to access user and administrator accounts.
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