Data Link Layer $(10$ points. $2\mathrm{.}5$ points for each switch table$)$

See the following network using Switches S$1,$ S$2,$ S$3,$ S$4.$ Assume the interfaces S$1$ connects to A$,$ B$,$ C$,$ and S$4$ are $11,12,13,14$ respectively, similarly $S2$ connecting to $D,E,F,$ and $S4$ are via $21,22,23,24$ respectively; S$3$ connecting to $G,H,$I,$S4$ via $31,32,33,34$ respectively; and $S4$ connecting to $S1,S2,$ and $S3$ via $41,42,$ and $43$ respectively. Please give the switch table for $S1,S2,S3,$ and $S4$ respectively. We assume the name of each host can be used as its MAC address, and ignore TTL for each switch table.

Please fill up the following tables.

Switch Table for $S1$

$\backslash$table$[[\backslash$table$[[$MAC Address $($using A$,],[B,C,$ or Others$)]],\backslash$table$[[$Interfaces $($Using $11,12,],[13),$ or $14$