In network monitoring, what may result in significant traffic flow between a primary data center and a hot site?

Synchronous replication is the correct choice because it involves real-time mirroring of data between the primary data center and the hot site. This means that every write operation made at the primary site is simultaneously committed to the hot site. As a result, there is a constant and significant flow of data traffic to ensure that both sites are always in sync. This type of replication is crucial for organizations requiring high availability and immediate failover capability, as it minimizes data loss during an outage.

In contrast, asynchronous replication does not involve real-time data transfer; instead, it captures changes at the primary data center and sends them to the hot site at set intervals. Consequently, this method generates less continuous traffic because data does not have to be transmitted immediately and synchronously.

File transfer typically refers to the movement of files between systems rather than ongoing replication, and while it might create some traffic, it is generally not as consistent or significant as the traffic generated by synchronous replication.

Continuity updates may refer to updates to disaster recovery plans or configurations within the environment but are not typically associated with the actual data replication process. Therefore, while they play a role in overall continuity planning, they do not directly result in significant and continuous traffic flow like synchronous replication does.