What is the function of an OSPF Inbound Area LSA Type 3 Filter-List?

The function of an OSPF Inbound Area LSA Type 3 Filter-List is to filter prefixes that are sent from all areas into a specific area. This type of filter is crucial for controlling the flow of routing information between different OSPF areas. When implemented, it allows network administrators to specify which external routes should be accepted by an area, ensuring that only desired prefixes are propagated into that area.

By utilizing this filter, administrators can optimize routing within OSPF by controlling the amount of routing information that is allowed into an area, thus helping to manage bandwidth and processing overhead. This is particularly useful in larger networks with multiple areas where excessive routing information might lead to unnecessary complexity and resource usage.

The other choices do not accurately describe the purpose of an OSPF Inbound Area LSA Type 3 Filter-List. For instance, filtering based on administrative distance or impacting outbound filtering pertains to different functionalities that are not specific to this type of filter.