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Exam 4A0-101 topic 3 question 42 discussion

Actual exam question from Alcatel-Lucent's 4A0-101
Question #: 42
Topic #: 3
[All 4A0-101 Questions]

When IS-IS is electing a DIS, what is used as the tie breaker on an Alcatel-Lucent 7750 SR, if the priorities are the same?

  • A. The system ID
  • B. The loopback address
  • C. The sequence number of the Hello packet
  • D. The device that first initiated communication becomes the DIS
  • E. The highest interface MAC address
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Suggested Answer: E 🗳️
by HJVJ at April 2, 2020, 2:29 p.m.

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HJVJ
4 years, 11 months ago
Routers exchange Hello PDUs to form an adjacency and to elect the DIS on a broadcast network. The DIS election is preemptive and is the router with the high-est priority, or the highest interface MAC address as a tiebreaker
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