After executing the command below, how can we determine the process listening on port $5678?$

ubuntu@ubuntu:~$ netstat $-$an $|$ grep tcp $|$ grep $-$i listen

tcp $00127\mathrm{.}0\mathrm{.}0\mathrm{.}1$:$6310\mathrm{.}0\mathrm{.}0\mathrm{.}0$:$*$ LISTEN

tcp $000\mathrm{.}0\mathrm{.}0\mathrm{.}0$:$56780\mathrm{.}0\mathrm{.}0\mathrm{.}0$:$*$ LISTEN

tcp $00127\mathrm{.}0\mathrm{.}0\mathrm{.}53$:$530\mathrm{.}0\mathrm{.}0\mathrm{.}0$:$*$ LISTEN

tcp$600$ :::$5678$ :::$*$ LISTEN

tcp$600$ :::$21$ :::$*$ LISTEN

tcp$600$ :::$80$ :::$*$ LISTEN

tcp$600$ ::$1$:$631$ :::$*$ LISTEN

Question $16$Answer

a$.$

Executing ps aux $|$ grep $5678$

b$.$

Executing, as root, the command netstat $-$p $5678$

c$.$

Executing, as root, the command lsof $-$i:$5678$

d$.$

Executing, as root, the command netstat $/$port $5678$