Click the Exhibit button. In the exhibit Router A and Router B are operating on the LAN with
Router B acting as the designated intermediate system (DIS). When Router C and Router D
are added to the LAN. Which statement is true?
A.
Router D becomes the new DIS with no backup DIS.
B.
Router C becomes the new DIS with Router B as the backup DIS.
C.
Router C becomes the new DIS with no backup DIS.
D.
Router D becomes the new DIS with Router A as the backup DIS.
Explanation:
Router B remains DIS until it is rebooted. If question assume router C and D added before Router B rebooted the answer is C. Otherwise true answer is not on the list.
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IS-IS has the conception of preemption so Router C will become the new DIS, and IS-IS has no backup DIS.
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