3. What protocol is being used between the two IP addresses? What does that protocol provide?

I posted this question below before and did not get the right answer. Why can I do about that?

What is the IP address of the client

\begin{tabular}{|l|l|l|l|l|} \hline Source IP & Destination IP & Source Port & Destination Port & Number of Bytes \\ \hline 1.2.3.4 & 5.6.7.8 & 23456 & 443 & 105678 \\ \hline 1.2.3.4 & 5.6.7.8 & 23456 & 443 & 904567 \\ \hline 1.2.3.4 & 5.6.7.8 & 23456 & 443 & 94856 \\ \hline 1.2.3.4 & 5.6.7.8 & 23456 & 443 & 497989 \\ \hline 5.6.7.8 & 1.2.3.4 & 443 & 23456 & 2500 \\ \hline \end{tabular}