4A0-101

4A0-101 practice questions, page 11 of 13, with answer review and explanations.

Question 51

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

  1. The system ID.
  2. The loopback address.
  3. The sequence number of the Hello packet.
  4. The device that first initiated communication becomes the DIS
  5. The highest interface MAC address.

Question 52

Two IS-IS L1/L2 routers are in the same area on the same Ethernet segment. How many adjacencies will be formed between them?

  1. None
  2. 1
  3. 2
  4. 3
  5. 4

Question 53

In IS-IS, which of the following statements regarding an L1/L2 router is false?

  1. An L1/L2 router can have neighbors in different areas.
  2. An L1/L2 router calculates separate SPF trees for the Level 1 and Level 2 topology.
  3. An L1/L2 router advertises its L2 routes to its L1 neighbors.
  4. An L1/L2 router sets the ATT bit in L1 LSPs to identify itself as an L1 router.

Question 54

How are IS-IS LSPs sent on point-to-point links?

  1. They are sent using multicast MAC addresses 0180:0200:0014.
  2. They are sent using multicast MAC addresses 0180:c200:0015.
  3. They are sent using a unicast address.
  4. None of the above.

Question 55

Given the NSAP address of 49.0012.1234.1234.1234.00, what area does the IS-IS router reside in?

  1. 49.0012.1234
  2. 49.0012
  3. 12.1234
  4. 1234
  5. 49.1234