An Alcatel-Lucent 7750 SR Is Unable to Locate a Multicast

question 159

Multiple Choice

An Alcatel-Lucent 7750 SR is unable to locate a multicast source address in the multicast forwarding table. However, the source address is available in the unicast forwarding table. Which statement best describes the default RPF check behavior of the 7750 SR?

• A) The RPF check will fail as PIM relies exclusively on the multicast forwarding table by default
• B) The RPF check will not fail, as by default PIM uses the multicast forwarding table first for RPF check, if not found in the multicast forwarding table then refers to unicast forwarding table
• C) The RPF check will not fail as PIM uses only the unicast forwarding table by default
• D) The RPF check will fail as the RPF check requires that the source address be present in both the unicast and multicast forwarding table
• E) Not enough information is provided to answer the question

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Definitions:

Sympathetic Division

Part of the autonomic nervous system that prepares the body for quick action in emergencies; "fight or flight" response.

Parasympathetic Division

Part of the autonomic nervous system responsible for conserving energy and bringing the body to a state of rest by slowing the heart rate, increasing intestinal and glandular activity, and relaxing sphincter muscles.

Central Nervous System

The part of the nervous system consisting of the brain and spinal cord, which interprets sensory information and issues instructions based on past experience and current conditions.

Peripheral Nervous System

The peripheral nervous system is the part of the nervous system that consists of the nerves and ganglia outside of the brain and spinal cord, which connect the central nervous system to limbs and organs.