a. Summarize the Key Differences between nologin and a locked password

b. Meanings of dig queries

0. Complete the netstat flag table (10 points for all 3 correct meanings; 0 points for anything less) \begin{tabular}{|c|l|} \hline Flag & Meaning \\ \hlinet & \\ \hline1 & \\ \hlinen & \\ \hline \end{tabular}