Which two statements are correct about IS-IS interfaces? (Choose two.)
Which two statements are correct about IS-IS interfaces? (Choose two.)
For IS-IS interfaces, if a point-to-point interface is in both L1 and L2, one combined hello message is sent for both levels. This is done for efficiency and simplification. On the other hand, if a broadcast interface is in both L1 and L2, separate hello messages are sent for each level to ensure proper operation and differentiation between the levels.
answer B,C
BC is correct
Correct answer is B and C