Imagine WAN Connections of an Enterprise Network Running on the AT&T's

Multiple Choice

Imagine WAN connections of an enterprise network running on the AT&T's PSDN as follows.

-What IP address-Virtual Circuit mapping information would R1 need to maintain to deliver packets to R2 and R3?
$\begin{array}{|ll|c|}\hline &{\text { IP address of }} & \text {Virtual circuit} \\&{\text { Destination Routers }} & \text { Identifier } \\\hline \text { (1) } & 10.10 .10 .2 & \text { VC1 } \\\text { (2) } & 10.10 .10 .2 & \text { VC2 } \\\text { (3) } & 172.16 .10 .2 & \text { VC3 } \\\text { (4) } & 172.16 .10 .2 & \text { VC4 } \\\text { (5) } & 192.168 .10 .1 & \text { VC5 } \\\text { (6) } & 192.168 .10 .1 & \text { VC6 } \\\hline\end{array}$

A) (1) and (2)
B) (1) and (3)
C) (1) , (3) , and (5)
D) (1) , (2) , (3) , and (4)
E) (1) , (2) , (3) , (4) , (5) and (6)