Answer:b) Execute ipconfig /registerdns
Explanation:Execute ipconfig /registerdns is the execution command that is given by an operating system to the DNS server for updating the records or troubleshooting the problems.It initiates in the updating the records of the DNS names , IP addresses etc in a dynamic manner. This command also help in a quick registration and other activities without the reboot process in the users operating system.
Therefore,the correct option is option(b).
