Q55

The forwarding table of a router is shown below.

$$\begin{array}{|l|l|c|} \hline \textbf{Subnet Number} & \textbf{Subnet Mask} & \textbf{Interface ID} \\ \hline 200.150 .0 .0 & 255.255 .0 .0 & 1 \\ \hline 200.150 .64 .0 & 255.255 .224 .0 & 2 \\ \hline 200.150 .68 .0 & 255.255 .255 .0 & 3 \\ \hline 200.150 .68 .64 & 255.255 .255 .224 & 4 \\ \hline \text{Default} & & 0 \\ \hline \end{array}$$

A packet addressed to a destination address $200.150 .68 .118$ arrives at the router. It will be forwarded to the interface with $\text{ID}$ __________.