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4A0-101 · Question #306

A new router is added to a broadcast network. What is used by IS-IS as the tie breaker for selecting the DIS if the priorities are the same?

The correct answer is E. The router with the highest interface MAC address. See the full explanation below for the reasoning.

Question

A new router is added to a broadcast network. What is used by IS-IS as the tie breaker for selecting the DIS if the priorities are the same?

Options

  • AThe router with the highest system ID.
  • BThe router with the highest loopback address.
  • CThe Hello packet with the highest sequence number.
  • DThe existing DIS remains the DIS.
  • EThe router with the highest interface MAC address.

How the community answered

(46 responses)
  • A
    2% (1)
  • B
    4% (2)
  • C
    13% (6)
  • D
    9% (4)
  • E
    72% (33)

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