Loss of an ALI node can result from which of the following?

Loss of an ALI node can result from which of the following?

• A. It can result from the failure of the computers serving the system.
• B. It can result from damage to the building housing the ALI node(s).
• C. It can result from interruption of data links between the ALI node(s) and the PSAPs.
• D. All of the above.

Answer: (D)

Loss of an ALI node can occur from multiple failure modes, so the best answer reflects that any of these situations can take the ALI service offline. If the computers serving the system fail—due to hardware or software issues—the ALI database can become unavailable, preventing PSAPs from retrieving caller-location data. If the building housing the ALI node is damaged, essential equipment may be destroyed or become inoperable, cutting off access to ALI services. If data links between the ALI node and the PSAPs are interrupted, the information can’t reach the dispatch centers even though the ALI data itself is intact. Because all these scenarios are plausible and can independently disable ALI functionality, “All of the above” is the correct understanding: any single failure mode can lead to loss of ALI. In practice, redundancy and disaster recovery planning—such as backup servers, alternate data paths, and offsite data replication—are essential to mitigate these risks.

Loss of an ALI node can occur from multiple failure modes, so the best answer reflects that any of these situations can take the ALI service offline. If the computers serving the system fail—due to hardware or software issues—the ALI database can become unavailable, preventing PSAPs from retrieving caller-location data. If the building housing the ALI node is damaged, essential equipment may be destroyed or become inoperable, cutting off access to ALI services. If data links between the ALI node and the PSAPs are interrupted, the information can’t reach the dispatch centers even though the ALI data itself is intact. Because all these scenarios are plausible and can independently disable ALI functionality, “All of the above” is the correct understanding: any single failure mode can lead to loss of ALI. In practice, redundancy and disaster recovery planning—such as backup servers, alternate data paths, and offsite data replication—are essential to mitigate these risks.