In the IS-IS network shown in the figure, each router is configured as follows.

In the IS-IS network shown in the figure, each router is configured as follows.

RTA-isis-1] cost-ste compatible

RTB-isis-1] cost-ste wide-compatible

RTC-isis-1] cost-ste narrow-compatible

Then it is _______ that can correctly calculate the link cost between each other. (Multiple choice)
A . RTA and RTB
B. RTB and RTC
C.RTA and RTC
D. neither

Answer: ABC