Question 1
A financial services firm is deploying a SIP Server High Availability (HA) pair across two geographically separate data centers connected by a low-latency MPLS link. During a disaster recovery test, a full network partition occurs between the data centers. Both SIP Server instances, configured as a primary/backup pair, incorrectly assume the 'primary' role, leading to a split-brain scenario. Which configuration parameter is most likely misconfigured, preventing the backup server from correctly detecting the primary's status during the partition?
Answer and explanation
Correct answer: C
In a geographically dispersed HA pair where a network partition is possible, a third-party arbitrator like Solution Control Server (SCS) is critical to prevent a split-brain scenario. The backup SIP Server will consult the arbitrator to confirm the primary server's status. If the arbitrator is also unreachable from the backup site or not configured, the backup server may incorrectly assume the primary is down and promote itself to primary, causing two active primary instances. The other options relate to failover timing and redundancy mode but do not directly address the split-brain arbitration mechanism.