(Topic 1) Which of the following statements regarding IS-IS Hello packets are true? Choose two answers.

(Topic 1) Which of the following statements regarding IS-IS Hello packets are true? Choose two answers.
A . Different types of Hello packets are exchanged on point-to-point networks than on broadcast networks.
B . L1/L2 Hello packets are exchanged on broadcast links.
C . Different L1 and L2 Hello packets are exchanged on broadcast links.
D . By default, Hello packets are sent every 5 seconds, and the timeout to declare a neighbor down is 15 seconds.

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Answer: A,C