Answer: a) Netbios enumeration
Explanation: Netbios enumeration(Network Basic Input Output System) is accessed by the hacker/ attackers for gaining the information about the network domain,computer device and other data.It can maintain the network over a local area network (LAN) for the sharing of the files , data and other resources. It can work for the identification of the computer network on the Windows.
Therefore, the correct option is option(a).