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Alcatel-Lucent 4A0-101 Exam
4A0-101 Alcatel-Lucent Interior Routing Protocols and High Availability (Page 2 )

Updated On: 1-Feb-2026
Page 2 of 37
PDF with 315 Questions

When a router receives an IP packet, but does not find a match in the routing table for the destination IP address, what actions are performed by the router?

  1. The packet is flooded out all router interfaces.
  2. The packet is dropped and an ICMP unreachable message is sent back to the source.
  3. The packet is silently discarded.
  4. The packet is flooded out all interfaces and an ICMP unreachable message is sent.

Answer(s): B



When an OSPF adjacency is stuck in the "ExchStart" state, what is the most likely cause?

  1. The MTU does not match on both interfaces
  2. OSPF is not enabled on one of the routers
  3. The Router ID is the same on both routers
  4. A OSPF Hello has not been received from the neighbor

Answer(s): A



Select the answer below that correctly lists the 5 different OSPF packet types.

  1. Hello, Link State Update, Link State Packet, Link State Acknowledgement, Database Descriptor
  2. Link State Update, Link State Refresh, Link State Acknowledgement, Database Descriptor, Notification
  3. Hello, Link State Refresh, Link State Update, Link State Acknowledgement, Link State Authentication
  4. Hello, Link State Update, Link State Request, Link State Acknowledgement, Database Descriptor

Answer(s): D



What causes an adjacency to change from "Init" to "Two Way"?

  1. When a Link State Update is received in response to a Link State Request
  2. When a router receives a Hello packet from a neighbor that contains its router id in the neighbor list
  3. When OSPF neighbors exchange Database Descriptor packets
  4. When a Link State Acknowledgement is received in response to a Link State Update

Answer(s): B



When redistributing OSPF into RIP V2 what must be taken into consideration for the redistribution to take place?

  1. The metric must be set accordingly for RIP
  2. The subnet mask must be removed from the OSPF route
  3. You must divide the cost of the OSPF route by three
  4. The router must be configured as an ASBR

Answer(s): A



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